./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V --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 bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:39:36,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:39:36,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:39:36,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:39:36,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:39:36,955 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:39:36,958 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:39:36,963 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:39:36,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:39:36,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:39:36,975 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:39:36,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:39:36,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:39:36,980 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:39:36,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:39:36,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:39:36,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:39:36,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:39:36,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:39:36,999 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:39:37,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:39:37,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:39:37,005 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:39:37,006 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:39:37,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:39:37,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:39:37,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:39:37,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:39:37,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:39:37,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:39:37,015 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:39:37,016 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:39:37,017 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:39:37,018 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:39:37,019 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:39:37,019 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:39:37,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:39:37,021 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:39:37,021 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:39:37,022 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:39:37,023 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:39:37,024 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:39:37,052 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:39:37,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:39:37,053 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:39:37,053 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:39:37,054 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:39:37,054 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:39:37,054 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:39:37,055 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:39:37,055 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:39:37,055 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:39:37,055 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:39:37,056 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:39:37,056 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:39:37,056 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:39:37,056 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:39:37,057 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:39:37,057 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:39:37,057 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:39:37,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:39:37,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:39:37,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:39:37,059 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:39:37,059 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:39:37,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:39:37,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:39:37,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:39:37,060 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:39:37,060 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:39:37,060 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:39:37,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:39:37,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:39:37,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:39:37,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:39:37,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:39:37,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:39:37,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:39:37,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:39:37,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:39:37,063 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:39:37,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:39:37,063 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:39:37,064 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:39:37,064 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_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-11-23 03:39:37,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:39:37,414 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:39:37,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:39:37,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:39:37,419 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:39:37,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-23 03:39:37,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/data/53225d7d4/2a8f043066df4b7b95d21a36e0647276/FLAG921fbfc2e [2021-11-23 03:39:38,083 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:39:38,084 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-23 03:39:38,106 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/data/53225d7d4/2a8f043066df4b7b95d21a36e0647276/FLAG921fbfc2e [2021-11-23 03:39:38,366 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/data/53225d7d4/2a8f043066df4b7b95d21a36e0647276 [2021-11-23 03:39:38,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:39:38,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:39:38,370 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:39:38,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:39:38,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:39:38,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:38,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7fee43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38, skipping insertion in model container [2021-11-23 03:39:38,378 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:38,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:39:38,449 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:39:38,796 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_4c03e77b-3379-404a-a57d-4aa17a7d3d79/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-23 03:39:38,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:39:38,814 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:39:38,878 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_4c03e77b-3379-404a-a57d-4aa17a7d3d79/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-23 03:39:38,887 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:39:38,924 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:39:38,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38 WrapperNode [2021-11-23 03:39:38,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:39:38,926 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:39:38,926 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:39:38,926 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:39:38,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:38,968 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,003 INFO L137 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2021-11-23 03:39:39,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:39:39,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:39:39,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:39:39,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:39:39,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,047 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:39:39,066 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:39:39,067 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:39:39,067 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:39:39,068 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (1/1) ... [2021-11-23 03:39:39,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:39:39,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:39,104 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:39:39,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:39:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:39:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:39:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:39:39,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:39:39,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:39:39,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:39:39,291 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:39:39,293 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:39:39,549 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:39:39,584 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:39:39,584 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:39:39,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:39 BoogieIcfgContainer [2021-11-23 03:39:39,587 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:39:39,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:39:39,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:39:39,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:39:39,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:39:38" (1/3) ... [2021-11-23 03:39:39,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50864d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:39, skipping insertion in model container [2021-11-23 03:39:39,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:39:38" (2/3) ... [2021-11-23 03:39:39,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50864d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:39:39, skipping insertion in model container [2021-11-23 03:39:39,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:39:39" (3/3) ... [2021-11-23 03:39:39,604 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-11-23 03:39:39,609 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:39:39,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-23 03:39:39,657 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:39:39,672 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 [2021-11-23 03:39:39,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-23 03:39:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 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) [2021-11-23 03:39:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:39:39,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:39,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:39:39,696 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:39,702 INFO L85 PathProgramCache]: Analyzing trace with hash 3883661, now seen corresponding path program 1 times [2021-11-23 03:39:39,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:39,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285822725] [2021-11-23 03:39:39,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:39,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:39,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:39,958 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285822725] [2021-11-23 03:39:39,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285822725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:39,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:39,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:39,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784224030] [2021-11-23 03:39:39,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:39,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:39,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:40,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:40,007 INFO L87 Difference]: Start difference. First operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-23 03:39:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,072 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-11-23 03:39:40,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:40,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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 [2021-11-23 03:39:40,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,086 INFO L225 Difference]: With dead ends: 53 [2021-11-23 03:39:40,086 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 03:39:40,088 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 [2021-11-23 03:39:40,094 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 03:39:40,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-23 03:39:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:40,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 03:39:40,135 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 4 [2021-11-23 03:39:40,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,136 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 03:39:40,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 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) [2021-11-23 03:39:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 03:39:40,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:39:40,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:39:40,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:39:40,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:40,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,140 INFO L85 PathProgramCache]: Analyzing trace with hash 3793582, now seen corresponding path program 1 times [2021-11-23 03:39:40,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183331884] [2021-11-23 03:39:40,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,177 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:40,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183331884] [2021-11-23 03:39:40,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183331884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:40,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:40,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:40,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030774255] [2021-11-23 03:39:40,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:40,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:40,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:40,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:40,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:40,181 INFO L87 Difference]: Start difference. First operand 40 states and 41 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) [2021-11-23 03:39:40,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,242 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-23 03:39:40,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:40,243 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 [2021-11-23 03:39:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,244 INFO L225 Difference]: With dead ends: 60 [2021-11-23 03:39:40,244 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 03:39:40,245 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 [2021-11-23 03:39:40,246 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:39:40,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 03:39:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-11-23 03:39:40,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-23 03:39:40,254 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 4 [2021-11-23 03:39:40,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,254 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-23 03:39:40,254 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) [2021-11-23 03:39:40,254 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-23 03:39:40,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:39:40,255 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,255 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:39:40,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:39:40,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash 3793583, now seen corresponding path program 1 times [2021-11-23 03:39:40,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13644114] [2021-11-23 03:39:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,310 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:40,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13644114] [2021-11-23 03:39:40,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13644114] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:40,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:40,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:40,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810206308] [2021-11-23 03:39:40,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:40,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:40,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:40,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:40,313 INFO L87 Difference]: Start difference. First operand 38 states and 39 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) [2021-11-23 03:39:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,353 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-23 03:39:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:40,353 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 [2021-11-23 03:39:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,355 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:39:40,355 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:39:40,355 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 [2021-11-23 03:39:40,357 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:40,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:39:40,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 03:39:40,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:40,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-23 03:39:40,365 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 4 [2021-11-23 03:39:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,365 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-23 03:39:40,365 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) [2021-11-23 03:39:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-23 03:39:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:39:40,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,366 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:39:40,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:39:40,367 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:40,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -649332982, now seen corresponding path program 1 times [2021-11-23 03:39:40,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764930301] [2021-11-23 03:39:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,421 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764930301] [2021-11-23 03:39:40,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764930301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:40,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:40,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:40,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660724341] [2021-11-23 03:39:40,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:40,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:39:40,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:39:40,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:39:40,424 INFO L87 Difference]: Start difference. First operand 36 states and 37 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) [2021-11-23 03:39:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,551 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-23 03:39:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:39:40,551 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 [2021-11-23 03:39:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,553 INFO L225 Difference]: With dead ends: 60 [2021-11-23 03:39:40,553 INFO L226 Difference]: Without dead ends: 60 [2021-11-23 03:39:40,553 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 [2021-11-23 03:39:40,555 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:39:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-23 03:39:40,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-11-23 03:39:40,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.894736842105263) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:40,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-23 03:39:40,561 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 6 [2021-11-23 03:39:40,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,561 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-23 03:39:40,561 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) [2021-11-23 03:39:40,561 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-23 03:39:40,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 03:39:40,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 03:39:40,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:39:40,565 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash -649332981, now seen corresponding path program 1 times [2021-11-23 03:39:40,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356034580] [2021-11-23 03:39:40,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:40,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356034580] [2021-11-23 03:39:40,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356034580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:40,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:40,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:40,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621324427] [2021-11-23 03:39:40,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:40,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:39:40,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:40,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:39:40,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:39:40,705 INFO L87 Difference]: Start difference. First operand 35 states and 36 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) [2021-11-23 03:39:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:40,778 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-23 03:39:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:39:40,782 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 [2021-11-23 03:39:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:40,782 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:39:40,783 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:39:40,784 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 [2021-11-23 03:39:40,789 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:40,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:39:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-11-23 03:39:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:40,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-23 03:39:40,802 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 6 [2021-11-23 03:39:40,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:40,803 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-23 03:39:40,803 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) [2021-11-23 03:39:40,803 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-23 03:39:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:39:40,804 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:40,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:40,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:39:40,805 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 255990205, now seen corresponding path program 1 times [2021-11-23 03:39:40,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518248469] [2021-11-23 03:39:40,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518248469] [2021-11-23 03:39:40,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518248469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:39:40,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273824186] [2021-11-23 03:39:40,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:40,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:40,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:40,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:40,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:39:40,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:40,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:39:40,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:40,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:40,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:41,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273824186] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1831495764] [2021-11-23 03:39:41,069 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:39:41,069 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:39:41,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:39:41,080 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:39:41,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:39:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,168 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 [2021-11-23 03:39:41,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,270 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 22 treesize of output 30 [2021-11-23 03:39:41,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:39:41,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 03:39:41,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:39:41,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:39:41,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 03:39:41,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,537 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 [2021-11-23 03:39:41,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 03:39:41,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:41,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:39:41,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:41,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:39:41,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:39:41,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:41,970 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:39:41,971 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 371 treesize of output 353 [2021-11-23 03:39:42,032 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:42,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 359 [2021-11-23 03:39:42,102 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:42,102 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 359 treesize of output 366 [2021-11-23 03:39:42,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:42,646 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:42,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 707 treesize of output 708 [2021-11-23 03:39:42,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:42,721 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:42,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 705 treesize of output 706 [2021-11-23 03:39:42,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:42,803 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:39:42,804 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 703 treesize of output 684 [2021-11-23 03:39:43,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:43,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:43,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:43,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:43,572 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:39:43,573 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 402 treesize of output 387 [2021-11-23 03:39:43,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:43,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:43,612 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:43,613 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 383 treesize of output 376 [2021-11-23 03:39:43,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:43,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:43,651 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:43,652 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 385 treesize of output 378 [2021-11-23 03:39:43,893 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:39:43,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 437 treesize of output 441 [2021-11-23 03:39:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:44,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:44,196 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:39:44,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 371 treesize of output 353 [2021-11-23 03:39:44,246 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:44,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 359 [2021-11-23 03:39:44,294 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:44,295 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 359 treesize of output 366 [2021-11-23 03:39:44,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:44,541 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 401 treesize of output 402 [2021-11-23 03:39:44,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:44,605 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:39:44,605 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 399 treesize of output 400 [2021-11-23 03:39:44,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:44,665 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:44,666 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 402 treesize of output 403 [2021-11-23 03:39:45,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:45,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:45,182 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:45,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:39:45,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:45,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:45,226 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:45,227 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 412 treesize of output 405 [2021-11-23 03:39:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:45,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:45,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:45,268 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:39:45,269 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 468 treesize of output 453 [2021-11-23 03:39:45,427 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 [2021-11-23 03:39:45,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-23 03:39:45,445 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:39:48,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1831495764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:48,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:39:48,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2021-11-23 03:39:48,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600867324] [2021-11-23 03:39:48,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:48,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:39:48,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:48,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:39:48,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:39:48,024 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:48,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:48,263 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-11-23 03:39:48,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:39:48,263 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-11-23 03:39:48,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:48,264 INFO L225 Difference]: With dead ends: 53 [2021-11-23 03:39:48,264 INFO L226 Difference]: Without dead ends: 53 [2021-11-23 03:39:48,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-23 03:39:48,267 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:48,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:39:48,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-23 03:39:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-11-23 03:39:48,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.8) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-23 03:39:48,272 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 9 [2021-11-23 03:39:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:48,272 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-23 03:39:48,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:48,272 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-23 03:39:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:39:48,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:48,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:48,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:39:48,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:48,475 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:48,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:48,475 INFO L85 PathProgramCache]: Analyzing trace with hash 255988536, now seen corresponding path program 1 times [2021-11-23 03:39:48,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:48,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933046950] [2021-11-23 03:39:48,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:48,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:48,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:48,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933046950] [2021-11-23 03:39:48,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933046950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:39:48,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123679669] [2021-11-23 03:39:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:48,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:48,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:48,531 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:39:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:48,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:39:48,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:48,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:39:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:48,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123679669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:39:48,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1418284207] [2021-11-23 03:39:48,651 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:39:48,651 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:39:48,652 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:39:48,652 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:39:48,652 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:39:48,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,672 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 [2021-11-23 03:39:48,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,704 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 22 treesize of output 30 [2021-11-23 03:39:48,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:39:48,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 03:39:48,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:39:48,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:39:48,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,858 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 [2021-11-23 03:39:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:39:48,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,915 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 [2021-11-23 03:39:48,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:48,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:39:48,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:48,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:39:48,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:48,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:39:49,144 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:49,145 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 371 treesize of output 378 [2021-11-23 03:39:49,190 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:49,190 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 378 treesize of output 385 [2021-11-23 03:39:49,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,216 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:39:49,216 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 385 treesize of output 367 [2021-11-23 03:39:49,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:49,443 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:39:49,444 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 401 treesize of output 402 [2021-11-23 03:39:49,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,502 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:49,503 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 404 treesize of output 405 [2021-11-23 03:39:49,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,570 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:49,570 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 402 treesize of output 403 [2021-11-23 03:39:49,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:49,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:49,975 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:39:49,975 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 410 treesize of output 395 [2021-11-23 03:39:49,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:49,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:50,014 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:50,015 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 391 treesize of output 384 [2021-11-23 03:39:50,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:50,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:50,055 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:39:50,056 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 447 treesize of output 440 [2021-11-23 03:39:50,292 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:39:50,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 457 treesize of output 461 [2021-11-23 03:39:50,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:50,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:50,659 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:39:50,660 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 371 treesize of output 353 [2021-11-23 03:39:50,707 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:50,708 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 352 treesize of output 359 [2021-11-23 03:39:50,751 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:39:50,752 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 359 treesize of output 366 [2021-11-23 03:39:51,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:51,188 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:51,189 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 888 treesize of output 883 [2021-11-23 03:39:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:51,250 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:39:51,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 880 treesize of output 881 [2021-11-23 03:39:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,317 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:39:51,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 878 treesize of output 847 [2021-11-23 03:39:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:51,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:51,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:39:51,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,856 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:39:51,857 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 406 treesize of output 391 [2021-11-23 03:39:51,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,896 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:51,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 387 treesize of output 380 [2021-11-23 03:39:51,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:39:51,928 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:39:51,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 389 treesize of output 382 [2021-11-23 03:39:52,108 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 [2021-11-23 03:39:52,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:39:52,120 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:39:54,563 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '695#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:39:54,564 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:39:54,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:39:54,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-23 03:39:54,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47994893] [2021-11-23 03:39:54,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:39:54,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:39:54,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:54,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:39:54,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:39:54,566 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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) [2021-11-23 03:39:54,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:54,587 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-23 03:39:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:39:54,588 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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 9 [2021-11-23 03:39:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:54,589 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:39:54,589 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:39:54,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:39:54,590 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:54,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:39:54,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:39:54,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 03:39:54,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.64) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:54,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 03:39:54,602 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 9 [2021-11-23 03:39:54,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:54,602 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 03:39:54,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 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) [2021-11-23 03:39:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 03:39:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:39:54,603 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:54,603 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 03:39:54,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-23 03:39:54,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:54,804 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:39:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:54,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394808, now seen corresponding path program 2 times [2021-11-23 03:39:54,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:54,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813008588] [2021-11-23 03:39:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:54,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:39:54,906 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:54,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813008588] [2021-11-23 03:39:54,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813008588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:39:54,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576814283] [2021-11-23 03:39:54,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:39:54,907 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:54,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:54,923 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:54,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:39:54,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 03:39:54,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:39:54,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:39:54,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:55,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:39:55,026 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:39:55,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 03:39:55,113 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:39:55,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 19 [2021-11-23 03:39:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:39:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576814283] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:11,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:40:11,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2021-11-23 03:40:11,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223273302] [2021-11-23 03:40:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:40:11,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:11,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:40:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=136, Unknown=5, NotChecked=0, Total=210 [2021-11-23 03:40:11,926 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-11-23 03:40:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:11,983 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-23 03:40:11,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:11,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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 14 [2021-11-23 03:40:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:11,985 INFO L225 Difference]: With dead ends: 52 [2021-11-23 03:40:11,985 INFO L226 Difference]: Without dead ends: 52 [2021-11-23 03:40:11,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=78, Invalid=157, Unknown=5, NotChecked=0, Total=240 [2021-11-23 03:40:11,986 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 65 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:11,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 31 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 35 Unchecked, 0.0s Time] [2021-11-23 03:40:11,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-23 03:40:11,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-11-23 03:40:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:11,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-23 03:40:11,990 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 14 [2021-11-23 03:40:11,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:11,990 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-23 03:40:11,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 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) [2021-11-23 03:40:11,990 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-23 03:40:11,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:40:11,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:11,991 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 03:40:12,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:12,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:12,215 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394807, now seen corresponding path program 1 times [2021-11-23 03:40:12,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:12,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178641388] [2021-11-23 03:40:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:12,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:12,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:12,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178641388] [2021-11-23 03:40:12,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178641388] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:12,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282989021] [2021-11-23 03:40:12,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:12,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:12,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:12,371 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:12,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:40:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:12,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:40:12,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:12,445 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 [2021-11-23 03:40:12,472 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:40:12,472 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 15 treesize of output 17 [2021-11-23 03:40:12,632 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 03:40:12,633 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 3 case distinctions, treesize of input 27 treesize of output 32 [2021-11-23 03:40:12,793 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:12,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282989021] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1236977702] [2021-11-23 03:40:17,146 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:40:17,146 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:17,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:17,146 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:17,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,173 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 [2021-11-23 03:40:17,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,213 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 22 treesize of output 30 [2021-11-23 03:40:17,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:40:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 03:40:17,265 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 [2021-11-23 03:40:17,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,300 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 [2021-11-23 03:40:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:17,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:40:17,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:17,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:17,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:40:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,417 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 [2021-11-23 03:40:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:40:17,599 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:17,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 378 treesize of output 385 [2021-11-23 03:40:17,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,616 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:17,616 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 385 treesize of output 367 [2021-11-23 03:40:17,656 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:17,656 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 366 treesize of output 373 [2021-11-23 03:40:17,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:17,867 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:17,868 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 408 treesize of output 409 [2021-11-23 03:40:17,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,914 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:17,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 411 treesize of output 412 [2021-11-23 03:40:17,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:17,988 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:17,989 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 409 treesize of output 410 [2021-11-23 03:40:18,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:18,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:18,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:18,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:18,417 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:40:18,417 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 410 treesize of output 395 [2021-11-23 03:40:18,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:18,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:18,451 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:18,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:18,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:18,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:18,478 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:18,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 447 treesize of output 440 [2021-11-23 03:40:18,677 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:40:18,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 457 treesize of output 461 [2021-11-23 03:40:18,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:18,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:18,953 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:18,954 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 378 treesize of output 360 [2021-11-23 03:40:19,006 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:19,006 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 359 treesize of output 366 [2021-11-23 03:40:19,054 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:19,054 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 366 treesize of output 373 [2021-11-23 03:40:19,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:19,547 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:19,548 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 1231 treesize of output 1180 [2021-11-23 03:40:19,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:19,614 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:19,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1222 treesize of output 1217 [2021-11-23 03:40:19,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:19,668 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:19,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1214 treesize of output 1209 [2021-11-23 03:40:20,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:20,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:20,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:20,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:20,365 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:40:20,366 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 545 treesize of output 522 [2021-11-23 03:40:20,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:20,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:20,402 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:20,402 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 526 treesize of output 519 [2021-11-23 03:40:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:20,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:20,443 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:20,444 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 576 treesize of output 569 [2021-11-23 03:40:20,591 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 [2021-11-23 03:40:20,601 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 [2021-11-23 03:40:20,604 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:23,619 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1062#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (< (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|) (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4)) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:23,619 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:23,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:23,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 3] total 12 [2021-11-23 03:40:23,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48379330] [2021-11-23 03:40:23,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:23,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:40:23,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:40:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=351, Unknown=1, NotChecked=0, Total=462 [2021-11-23 03:40:23,621 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:23,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:23,721 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-23 03:40:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:40:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:40:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:23,722 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:40:23,722 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 03:40:23,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=142, Invalid=457, Unknown=1, NotChecked=0, Total=600 [2021-11-23 03:40:23,723 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:23,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 51 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-11-23 03:40:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 03:40:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 03:40:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 38 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) [2021-11-23 03:40:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-23 03:40:23,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 14 [2021-11-23 03:40:23,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:23,728 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-23 03:40:23,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:23,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-23 03:40:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:40:23,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:23,729 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:40:23,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:40:23,935 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:23,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:23,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401228, now seen corresponding path program 1 times [2021-11-23 03:40:23,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382992674] [2021-11-23 03:40:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:24,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:40:24,019 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:24,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382992674] [2021-11-23 03:40:24,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382992674] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:24,019 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:24,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:40:24,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568137671] [2021-11-23 03:40:24,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:24,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:24,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:24,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:24,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:24,021 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-11-23 03:40:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:24,146 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-11-23 03:40:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:24,147 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 15 [2021-11-23 03:40:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:24,147 INFO L225 Difference]: With dead ends: 49 [2021-11-23 03:40:24,147 INFO L226 Difference]: Without dead ends: 49 [2021-11-23 03:40:24,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:40:24,149 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 34 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:24,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 62 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-23 03:40:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2021-11-23 03:40:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-23 03:40:24,153 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 15 [2021-11-23 03:40:24,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:24,154 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-23 03:40:24,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-11-23 03:40:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-23 03:40:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:40:24,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:24,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 03:40:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 03:40:24,155 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401229, now seen corresponding path program 1 times [2021-11-23 03:40:24,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:24,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469882008] [2021-11-23 03:40:24,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:24,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:24,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:24,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469882008] [2021-11-23 03:40:24,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469882008] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:24,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:24,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:40:24,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824831365] [2021-11-23 03:40:24,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:24,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:40:24,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:40:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:24,266 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2021-11-23 03:40:24,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:24,462 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-11-23 03:40:24,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:40:24,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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 [2021-11-23 03:40:24,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:24,463 INFO L225 Difference]: With dead ends: 50 [2021-11-23 03:40:24,464 INFO L226 Difference]: Without dead ends: 50 [2021-11-23 03:40:24,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:40:24,464 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 139 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:24,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 50 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:24,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-23 03:40:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-23 03:40:24,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 03:40:24,471 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 15 [2021-11-23 03:40:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:24,472 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 03:40:24,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 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) [2021-11-23 03:40:24,472 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 03:40:24,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:40:24,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:24,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:40:24,474 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash -64233658, now seen corresponding path program 1 times [2021-11-23 03:40:24,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:24,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265159402] [2021-11-23 03:40:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:24,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:24,562 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:24,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265159402] [2021-11-23 03:40:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265159402] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:24,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:24,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686909629] [2021-11-23 03:40:24,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:24,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:40:24,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:24,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:40:24,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:40:24,567 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-23 03:40:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:24,606 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-23 03:40:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:40:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-11-23 03:40:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:24,607 INFO L225 Difference]: With dead ends: 39 [2021-11-23 03:40:24,608 INFO L226 Difference]: Without dead ends: 39 [2021-11-23 03:40:24,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:40:24,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:24,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 20 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:24,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-23 03:40:24,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-23 03:40:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 38 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) [2021-11-23 03:40:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-23 03:40:24,613 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 16 [2021-11-23 03:40:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:24,613 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-23 03:40:24,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-11-23 03:40:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-23 03:40:24,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:40:24,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:24,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:24,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:40:24,615 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:24,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:24,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1991243403, now seen corresponding path program 1 times [2021-11-23 03:40:24,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:24,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604942923] [2021-11-23 03:40:24,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:24,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:24,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:24,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:24,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604942923] [2021-11-23 03:40:24,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604942923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:24,701 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:24,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:40:24,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875142270] [2021-11-23 03:40:24,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:24,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:40:24,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:24,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:40:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:24,703 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:24,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:24,835 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-11-23 03:40:24,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:40:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:40:24,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:24,836 INFO L225 Difference]: With dead ends: 47 [2021-11-23 03:40:24,836 INFO L226 Difference]: Without dead ends: 47 [2021-11-23 03:40:24,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:40:24,837 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 137 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:24,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-11-23 03:40:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-11-23 03:40:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:24,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-23 03:40:24,841 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 17 [2021-11-23 03:40:24,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:24,841 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-23 03:40:24,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:24,841 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-23 03:40:24,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:40:24,842 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:24,842 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:24,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:40:24,842 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:24,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1599003259, now seen corresponding path program 1 times [2021-11-23 03:40:24,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:24,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558676725] [2021-11-23 03:40:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:24,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:24,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:24,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558676725] [2021-11-23 03:40:24,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558676725] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:24,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:24,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 03:40:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221629172] [2021-11-23 03:40:24,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:24,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:40:24,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:40:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:40:24,918 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-11-23 03:40:25,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:25,089 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-23 03:40:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:40:25,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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 18 [2021-11-23 03:40:25,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:25,090 INFO L225 Difference]: With dead ends: 46 [2021-11-23 03:40:25,090 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:40:25,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:40:25,091 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 119 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:25,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 46 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:25,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:40:25,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-23 03:40:25,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 41 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) [2021-11-23 03:40:25,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-23 03:40:25,095 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 18 [2021-11-23 03:40:25,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:25,095 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-23 03:40:25,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 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) [2021-11-23 03:40:25,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-23 03:40:25,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:40:25,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:25,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:25,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:40:25,096 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:25,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:25,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1970506615, now seen corresponding path program 1 times [2021-11-23 03:40:25,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:25,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596930760] [2021-11-23 03:40:25,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:25,152 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596930760] [2021-11-23 03:40:25,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596930760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:25,152 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:25,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:40:25,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049556823] [2021-11-23 03:40:25,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:25,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:40:25,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:40:25,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:40:25,154 INFO L87 Difference]: Start difference. First operand 42 states and 43 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) [2021-11-23 03:40:25,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:25,215 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-23 03:40:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:25,215 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 [2021-11-23 03:40:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:25,216 INFO L225 Difference]: With dead ends: 41 [2021-11-23 03:40:25,216 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:40:25,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:40:25,219 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:25,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:40:25,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:40:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 30 states have (on average 1.4) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:25,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-23 03:40:25,223 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 19 [2021-11-23 03:40:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-23 03:40:25,224 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) [2021-11-23 03:40:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-23 03:40:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:40:25,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:25,226 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:25,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:40:25,226 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 956163016, now seen corresponding path program 1 times [2021-11-23 03:40:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007592980] [2021-11-23 03:40:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:25,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:40:25,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007592980] [2021-11-23 03:40:25,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007592980] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:25,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331290890] [2021-11-23 03:40:25,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:25,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:25,366 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:25,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:40:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:25,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:40:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:25,551 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:40:25,552 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 17 treesize of output 19 [2021-11-23 03:40:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:25,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331290890] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:25,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:40:25,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 13 [2021-11-23 03:40:25,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342181607] [2021-11-23 03:40:25,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:25,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:40:25,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:25,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:40:25,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:40:25,584 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-23 03:40:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:25,690 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-23 03:40:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:40:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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 20 [2021-11-23 03:40:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:25,691 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:40:25,691 INFO L226 Difference]: Without dead ends: 43 [2021-11-23 03:40:25,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:40:25,692 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:25,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 60 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2021-11-23 03:40:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-23 03:40:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-23 03:40:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 32 states have (on average 1.375) internal successors, (44), 42 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) [2021-11-23 03:40:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-23 03:40:25,695 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 20 [2021-11-23 03:40:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:25,695 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-23 03:40:25,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-11-23 03:40:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-23 03:40:25,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:40:25,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:25,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:25,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:25,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:40:25,897 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:25,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -250310995, now seen corresponding path program 1 times [2021-11-23 03:40:25,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:25,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58846031] [2021-11-23 03:40:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:25,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58846031] [2021-11-23 03:40:25,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58846031] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:25,929 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:25,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:25,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052957830] [2021-11-23 03:40:25,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:25,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:40:25,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:25,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:40:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:25,931 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:25,969 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-23 03:40:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:40:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:25,970 INFO L225 Difference]: With dead ends: 41 [2021-11-23 03:40:25,970 INFO L226 Difference]: Without dead ends: 41 [2021-11-23 03:40:25,970 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 [2021-11-23 03:40:25,971 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:25,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-23 03:40:25,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-23 03:40:25,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.3125) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-23 03:40:25,987 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 22 [2021-11-23 03:40:25,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:25,987 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-23 03:40:25,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-23 03:40:25,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:40:25,989 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:25,989 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:25,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:40:25,990 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:25,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:25,990 INFO L85 PathProgramCache]: Analyzing trace with hash -250310994, now seen corresponding path program 1 times [2021-11-23 03:40:25,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:25,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873292624] [2021-11-23 03:40:25,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:26,043 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:26,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873292624] [2021-11-23 03:40:26,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873292624] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:26,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113478332] [2021-11-23 03:40:26,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:26,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:26,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:26,050 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:26,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:40:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:40:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:26,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:26,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:26,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113478332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262959278] [2021-11-23 03:40:26,228 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:40:26,228 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:26,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:26,229 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:26,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,268 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 [2021-11-23 03:40:26,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,296 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 22 treesize of output 30 [2021-11-23 03:40:26,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-23 03:40:26,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:26,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 03:40:26,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:40:26,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,407 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 [2021-11-23 03:40:26,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-11-23 03:40:26,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:26,453 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 23 treesize of output 13 [2021-11-23 03:40:26,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:26,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:26,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:40:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:26,668 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-23 03:40:26,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 378 treesize of output 370 [2021-11-23 03:40:26,720 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:26,720 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 372 treesize of output 379 [2021-11-23 03:40:26,768 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:26,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 386 [2021-11-23 03:40:27,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:27,282 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-23 03:40:27,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1055 treesize of output 1024 [2021-11-23 03:40:27,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:27,361 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:27,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1058 treesize of output 1053 [2021-11-23 03:40:27,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:27,440 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:27,440 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 1050 treesize of output 1045 [2021-11-23 03:40:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:28,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:28,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:28,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:28,288 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:40:28,288 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 690 treesize of output 659 [2021-11-23 03:40:28,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:28,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:28,319 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:28,319 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 671 treesize of output 664 [2021-11-23 03:40:28,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:28,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:28,348 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:28,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 727 treesize of output 720 [2021-11-23 03:40:28,560 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:40:28,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 437 treesize of output 441 [2021-11-23 03:40:28,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:28,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:28,787 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-23 03:40:28,788 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 378 treesize of output 370 [2021-11-23 03:40:28,824 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:28,824 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 372 treesize of output 379 [2021-11-23 03:40:28,863 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:28,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 386 [2021-11-23 03:40:29,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:29,231 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:29,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 742 treesize of output 737 [2021-11-23 03:40:29,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:29,296 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-23 03:40:29,297 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 734 treesize of output 723 [2021-11-23 03:40:29,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:29,357 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:29,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 741 treesize of output 736 [2021-11-23 03:40:29,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:29,996 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:29,996 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 [2021-11-23 03:40:30,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:30,034 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:40:30,035 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 466 treesize of output 451 [2021-11-23 03:40:30,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:30,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:30,075 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:30,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 447 treesize of output 440 [2021-11-23 03:40:30,275 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:40:30,275 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 25 treesize of output 29 [2021-11-23 03:40:30,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:40:30,337 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-23 03:40:30,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 87 [2021-11-23 03:40:30,365 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:40:30,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:40:30,529 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:30,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:40:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:30,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:30,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:30,775 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:40:30,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:31,001 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 [2021-11-23 03:40:31,009 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 [2021-11-23 03:40:31,013 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:34,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2145#(and (< |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|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (< (select |#length| |ULTIMATE.start_main_~#s~0#1.base|) (+ |ULTIMATE.start_main_~#s~0#1.offset| 4)) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:34,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:34,332 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:34,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-23 03:40:34,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161652172] [2021-11-23 03:40:34,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:34,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:40:34,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:34,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:40:34,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-23 03:40:34,334 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:34,371 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-23 03:40:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-11-23 03:40:34,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:34,372 INFO L225 Difference]: With dead ends: 42 [2021-11-23 03:40:34,372 INFO L226 Difference]: Without dead ends: 42 [2021-11-23 03:40:34,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:40:34,373 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 49 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:34,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 40 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:40:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-23 03:40:34,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-11-23 03:40:34,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.303030303030303) internal successors, (43), 41 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) [2021-11-23 03:40:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-23 03:40:34,377 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 22 [2021-11-23 03:40:34,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:34,377 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-23 03:40:34,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:34,377 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-23 03:40:34,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:40:34,378 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:34,378 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:34,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:34,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:40:34,603 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:34,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:34,603 INFO L85 PathProgramCache]: Analyzing trace with hash -250312663, now seen corresponding path program 1 times [2021-11-23 03:40:34,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:34,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495011732] [2021-11-23 03:40:34,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:34,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:34,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495011732] [2021-11-23 03:40:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495011732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:34,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551641940] [2021-11-23 03:40:34,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:34,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:34,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:34,715 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:34,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:40:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:34,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:40:34,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:34,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:34,959 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:34,959 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 17 treesize of output 21 [2021-11-23 03:40:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:40:35,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551641940] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:35,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [98370484] [2021-11-23 03:40:35,036 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:40:35,036 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:35,036 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:35,036 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:35,036 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:35,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,070 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 [2021-11-23 03:40:35,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,107 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 22 treesize of output 30 [2021-11-23 03:40:35,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:35,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:40:35,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 03:40:35,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:35,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,202 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 [2021-11-23 03:40:35,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:35,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:40:35,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:35,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 03:40:35,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 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 [2021-11-23 03:40:35,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:40:35,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,363 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:35,363 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 371 treesize of output 353 [2021-11-23 03:40:35,421 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:35,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 359 [2021-11-23 03:40:35,476 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:35,477 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 359 treesize of output 366 [2021-11-23 03:40:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,879 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:35,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1203 treesize of output 1198 [2021-11-23 03:40:35,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:35,934 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:35,934 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 1195 treesize of output 1144 [2021-11-23 03:40:35,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:35,986 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:35,986 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 1186 treesize of output 1181 [2021-11-23 03:40:36,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:36,584 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:40:36,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 549 treesize of output 542 [2021-11-23 03:40:36,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:36,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:36,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:36,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:36,612 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:40:36,612 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 599 treesize of output 576 [2021-11-23 03:40:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:36,640 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:40:36,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 580 treesize of output 573 [2021-11-23 03:40:36,827 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:40:36,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 453 treesize of output 457 [2021-11-23 03:40:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,043 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:37,044 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 371 treesize of output 353 [2021-11-23 03:40:37,081 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:37,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 359 [2021-11-23 03:40:37,115 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:37,115 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 359 treesize of output 366 [2021-11-23 03:40:37,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,282 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:37,282 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 401 treesize of output 402 [2021-11-23 03:40:37,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,340 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:37,340 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 399 treesize of output 400 [2021-11-23 03:40:37,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,378 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:37,379 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 397 treesize of output 398 [2021-11-23 03:40:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:37,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,646 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:40:37,646 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 410 treesize of output 395 [2021-11-23 03:40:37,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,690 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:37,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:37,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:37,716 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:37,716 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 447 treesize of output 440 [2021-11-23 03:40:37,916 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:40:37,917 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 25 treesize of output 29 [2021-11-23 03:40:37,947 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 15 treesize of output 1 [2021-11-23 03:40:37,967 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-23 03:40:37,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 87 [2021-11-23 03:40:37,991 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:40:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:40:38,145 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:38,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:40:38,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:40:38,213 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 11 treesize of output 7 [2021-11-23 03:40:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:38,451 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:38,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:40:38,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:38,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:38,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:38,696 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 [2021-11-23 03:40:38,702 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 [2021-11-23 03:40:38,707 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:42,131 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2383#(and (<= 0 |ULTIMATE.start_sll_remove_first_#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) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (< (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|) (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4)) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:42,131 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:42,131 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:42,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2021-11-23 03:40:42,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503555255] [2021-11-23 03:40:42,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:42,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:40:42,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:40:42,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:40:42,133 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:42,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:42,188 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-23 03:40:42,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:40:42,189 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 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 [2021-11-23 03:40:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:42,189 INFO L225 Difference]: With dead ends: 40 [2021-11-23 03:40:42,189 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:40:42,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:40:42,190 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:42,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 17 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:40:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:40:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 03:40:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-23 03:40:42,192 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 22 [2021-11-23 03:40:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-23 03:40:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-23 03:40:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:40:42,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:42,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:42,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-23 03:40:42,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:42,411 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:42,411 INFO L85 PathProgramCache]: Analyzing trace with hash 830242028, now seen corresponding path program 1 times [2021-11-23 03:40:42,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:42,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856295617] [2021-11-23 03:40:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:42,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:42,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:42,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856295617] [2021-11-23 03:40:42,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856295617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690839147] [2021-11-23 03:40:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:42,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:42,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:42,839 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:42,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:40:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:42,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 03:40:42,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:42,934 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 [2021-11-23 03:40:43,034 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:40:43,035 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 [2021-11-23 03:40:43,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:40:43,376 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 25 treesize of output 17 [2021-11-23 03:40:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:43,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:43,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-11-23 03:40:43,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:43,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 28 [2021-11-23 03:40:43,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:43,677 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 33 treesize of output 17 [2021-11-23 03:40:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:43,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:43,897 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 47 treesize of output 39 [2021-11-23 03:40:44,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:44,071 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 141 treesize of output 143 [2021-11-23 03:40:44,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:44,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690839147] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:40:44,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [918019057] [2021-11-23 03:40:44,781 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:40:44,781 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:40:44,782 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:40:44,782 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:40:44,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:40:44,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,809 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 [2021-11-23 03:40:44,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,834 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 22 treesize of output 30 [2021-11-23 03:40:44,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:44,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:44,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:44,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:44,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:44,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:44,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 03:40:44,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:44,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:40:44,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 03:40:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:40:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,118 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:45,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 378 treesize of output 360 [2021-11-23 03:40:45,153 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:45,153 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 359 treesize of output 366 [2021-11-23 03:40:45,187 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:45,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 373 [2021-11-23 03:40:45,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,340 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:45,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 408 treesize of output 409 [2021-11-23 03:40:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,381 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:45,381 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 406 treesize of output 407 [2021-11-23 03:40:45,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,421 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:45,421 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 409 treesize of output 410 [2021-11-23 03:40:45,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:45,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,761 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:40:45,762 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 410 treesize of output 395 [2021-11-23 03:40:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,788 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:40:45,788 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 [2021-11-23 03:40:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:45,813 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-23 03:40:45,814 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 447 treesize of output 440 [2021-11-23 03:40:46,023 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:40:46,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 457 treesize of output 461 [2021-11-23 03:40:46,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:46,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:46,264 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:40:46,265 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 378 treesize of output 360 [2021-11-23 03:40:46,317 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:46,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 366 [2021-11-23 03:40:46,363 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:40:46,364 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 366 treesize of output 373 [2021-11-23 03:40:46,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:46,831 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:46,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1231 treesize of output 1226 [2021-11-23 03:40:46,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:46,892 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:40:46,892 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 1223 treesize of output 1172 [2021-11-23 03:40:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:46,948 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:40:46,948 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 1214 treesize of output 1209 [2021-11-23 03:40:47,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:47,536 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:40:47,537 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 556 treesize of output 549 [2021-11-23 03:40:47,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:47,586 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:40:47,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 582 treesize of output 575 [2021-11-23 03:40:47,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:47,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:40:47,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:40:47,621 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:40:47,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 638 treesize of output 615 [2021-11-23 03:40:47,887 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:40:47,887 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 25 treesize of output 29 [2021-11-23 03:40:47,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:40:47,955 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-23 03:40:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 87 [2021-11-23 03:40:47,977 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:40:47,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:40:48,161 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:48,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:40:48,204 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:40:48,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:40:48,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:48,396 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:40:48,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:40:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:40:48,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:40:48,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:40:48,591 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 [2021-11-23 03:40:48,597 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 [2021-11-23 03:40:48,603 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:40:52,907 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2653#(and (<= 0 |ULTIMATE.start_sll_remove_first_#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) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (= |ULTIMATE.start_sll_remove_first_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|)) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:40:52,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:40:52,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:40:52,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 44 [2021-11-23 03:40:52,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058187205] [2021-11-23 03:40:52,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:40:52,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 03:40:52,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 03:40:52,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=3015, Unknown=0, NotChecked=0, Total=3306 [2021-11-23 03:40:52,910 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:53,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:53,890 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-11-23 03:40:53,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:40:53,891 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 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 23 [2021-11-23 03:40:53,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:53,892 INFO L225 Difference]: With dead ends: 46 [2021-11-23 03:40:53,892 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:40:53,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=586, Invalid=4526, Unknown=0, NotChecked=0, Total=5112 [2021-11-23 03:40:53,895 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 100 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:53,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 133 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 479 Invalid, 0 Unknown, 133 Unchecked, 0.4s Time] [2021-11-23 03:40:53,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:40:53,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-23 03:40:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 41 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) [2021-11-23 03:40:53,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-11-23 03:40:53,897 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 23 [2021-11-23 03:40:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-11-23 03:40:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.4090909090909092) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:40:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-11-23 03:40:53,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:40:53,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:53,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:53,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:54,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:54,116 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:40:54,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:54,116 INFO L85 PathProgramCache]: Analyzing trace with hash 830242029, now seen corresponding path program 1 times [2021-11-23 03:40:54,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:54,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576387982] [2021-11-23 03:40:54,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:54,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:54,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:54,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:54,507 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576387982] [2021-11-23 03:40:54,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576387982] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:40:54,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118557691] [2021-11-23 03:40:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:54,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:54,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:54,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:54,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:40:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:54,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-23 03:40:54,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:54,595 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 [2021-11-23 03:40:54,730 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:40:54,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:40:54,750 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:40:54,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:40:54,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:40:54,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-23 03:40:55,549 INFO L354 Elim1Store]: treesize reduction 75, result has 14.8 percent of original size [2021-11-23 03:40:55,549 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 86 [2021-11-23 03:40:55,560 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-23 03:40:55,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 81 treesize of output 66 [2021-11-23 03:40:55,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:55,730 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 72 treesize of output 52 [2021-11-23 03:40:55,735 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:55,736 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 46 treesize of output 26 [2021-11-23 03:40:55,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:40:55,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:40:56,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:40:56,372 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 488 treesize of output 486 [2021-11-23 03:40:56,515 INFO L354 Elim1Store]: treesize reduction 26, result has 76.6 percent of original size [2021-11-23 03:40:56,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1132 treesize of output 1050 [2021-11-23 03:44:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-23 03:44:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:41,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118557691] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:41,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2110698375] [2021-11-23 03:44:41,079 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:44:41,080 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:41,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:41,080 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:41,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:41,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,106 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 [2021-11-23 03:44:41,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,136 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 22 treesize of output 30 [2021-11-23 03:44:41,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:44:41,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:44:41,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:41,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:44:41,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,229 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 [2021-11-23 03:44:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,247 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 [2021-11-23 03:44:41,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:41,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:44:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 03:44:41,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:41,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:44:41,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:44:41,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,442 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:44:41,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 378 treesize of output 360 [2021-11-23 03:44:41,480 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:41,480 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 359 treesize of output 366 [2021-11-23 03:44:41,515 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:41,516 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 366 treesize of output 373 [2021-11-23 03:44:41,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,670 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:41,670 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 408 treesize of output 409 [2021-11-23 03:44:41,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:41,717 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:44:41,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 406 treesize of output 407 [2021-11-23 03:44:41,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:41,761 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:41,761 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 409 treesize of output 410 [2021-11-23 03:44:42,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:42,040 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:44:42,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 429 treesize of output 422 [2021-11-23 03:44:42,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:42,077 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:44:42,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 491 treesize of output 484 [2021-11-23 03:44:42,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:42,099 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:44:42,099 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 523 treesize of output 508 [2021-11-23 03:44:42,256 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:44:42,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 512 treesize of output 508 [2021-11-23 03:44:42,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,462 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:44:42,462 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 378 treesize of output 360 [2021-11-23 03:44:42,503 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:42,503 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 359 treesize of output 366 [2021-11-23 03:44:42,540 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:42,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 373 [2021-11-23 03:44:42,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:42,912 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:44:42,912 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 1231 treesize of output 1180 [2021-11-23 03:44:42,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:42,980 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:42,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1222 treesize of output 1217 [2021-11-23 03:44:43,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:43,038 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1214 treesize of output 1209 [2021-11-23 03:44:43,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:43,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:43,586 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:44:43,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 545 treesize of output 538 [2021-11-23 03:44:43,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:43,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:43,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:43,614 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:44:43,614 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 553 treesize of output 530 [2021-11-23 03:44:43,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:43,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:43,658 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:44:43,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 534 treesize of output 527 [2021-11-23 03:44:43,892 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:44:43,892 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 25 treesize of output 29 [2021-11-23 03:44:43,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:44:43,963 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-23 03:44:43,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 91 [2021-11-23 03:44:43,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:43,976 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:44:43,976 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 2 case distinctions, treesize of input 82 treesize of output 60 [2021-11-23 03:44:44,130 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:44:44,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:44:44,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:44,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:44,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:44,410 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:44:44,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:44:44,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:44,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:44:44,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:44,593 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 [2021-11-23 03:44:44,603 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 [2021-11-23 03:44:44,604 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:44:49,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2962#(and (<= 0 |ULTIMATE.start_sll_remove_first_#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) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (or (< (+ |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset| 4) 0) (< (select |#length| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) (+ 8 |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|))) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:44:49,601 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:44:49,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:44:49,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 47 [2021-11-23 03:44:49,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383116739] [2021-11-23 03:44:49,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:44:49,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-23 03:44:49,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:44:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-23 03:44:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 03:44:49,603 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 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) [2021-11-23 03:44:51,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:44:51,626 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-23 03:44:51,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:44:51,629 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 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 23 [2021-11-23 03:44:51,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:44:51,630 INFO L225 Difference]: With dead ends: 46 [2021-11-23 03:44:51,630 INFO L226 Difference]: Without dead ends: 46 [2021-11-23 03:44:51,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=681, Invalid=5325, Unknown=0, NotChecked=0, Total=6006 [2021-11-23 03:44:51,632 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:44:51,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 221 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 379 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2021-11-23 03:44:51,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-23 03:44:51,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-23 03:44:51,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 41 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) [2021-11-23 03:44:51,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-11-23 03:44:51,635 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 23 [2021-11-23 03:44:51,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:44:51,635 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-11-23 03:44:51,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.446808510638298) internal successors, (68), 48 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) [2021-11-23 03:44:51,636 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-11-23 03:44:51,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:44:51,636 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:44:51,637 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:44:51,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:44:51,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:51,843 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:44:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:44:51,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1001289899, now seen corresponding path program 1 times [2021-11-23 03:44:51,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:44:51,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972884805] [2021-11-23 03:44:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:51,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:44:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:52,102 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:44:52,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972884805] [2021-11-23 03:44:52,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972884805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:44:52,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20682017] [2021-11-23 03:44:52,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:44:52,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:44:52,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:44:52,103 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:44:52,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:44:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:44:52,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-23 03:44:52,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:44:52,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:44:52,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 03:44:52,636 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-23 03:44:52,636 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 33 [2021-11-23 03:44:52,740 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:44:52,741 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 26 treesize of output 10 [2021-11-23 03:44:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:52,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:44:52,943 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 34 treesize of output 26 [2021-11-23 03:44:52,991 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:44:52,991 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 88 treesize of output 88 [2021-11-23 03:44:53,024 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 34 treesize of output 28 [2021-11-23 03:44:53,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:44:53,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 140 [2021-11-23 03:44:53,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:44:53,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20682017] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:44:53,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1019399168] [2021-11-23 03:44:53,534 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:44:53,535 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:44:53,536 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:44:53,537 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:44:53,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:44:53,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,565 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 [2021-11-23 03:44:53,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,592 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 22 treesize of output 30 [2021-11-23 03:44:53,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:53,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:44:53,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,637 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 [2021-11-23 03:44:53,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:44:53,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:44:53,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,687 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 [2021-11-23 03:44:53,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,711 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 [2021-11-23 03:44:53,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 03:44:53,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:53,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-23 03:44:53,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:44:53,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:53,858 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:44:53,859 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 378 treesize of output 360 [2021-11-23 03:44:53,899 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:53,899 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 359 treesize of output 366 [2021-11-23 03:44:53,932 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:53,933 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 366 treesize of output 373 [2021-11-23 03:44:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,299 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:44:54,299 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 1231 treesize of output 1180 [2021-11-23 03:44:54,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,355 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:54,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1222 treesize of output 1217 [2021-11-23 03:44:54,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,412 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:54,412 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 1214 treesize of output 1209 [2021-11-23 03:44:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:54,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:54,990 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:44:54,990 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 545 treesize of output 522 [2021-11-23 03:44:55,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:55,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:55,036 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:44:55,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 526 treesize of output 519 [2021-11-23 03:44:55,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:55,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:55,076 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:44:55,076 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 534 treesize of output 527 [2021-11-23 03:44:55,285 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:44:55,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 437 treesize of output 441 [2021-11-23 03:44:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,466 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:44:55,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 378 treesize of output 360 [2021-11-23 03:44:55,501 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:55,502 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 359 treesize of output 366 [2021-11-23 03:44:55,534 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:44:55,534 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 366 treesize of output 373 [2021-11-23 03:44:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,784 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:55,784 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 721 treesize of output 722 [2021-11-23 03:44:55,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:55,834 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:44:55,834 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 719 treesize of output 700 [2021-11-23 03:44:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:55,914 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:44:55,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 718 treesize of output 719 [2021-11-23 03:44:56,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,356 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:44:56,356 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 431 treesize of output 424 [2021-11-23 03:44:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,389 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:44:56,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 463 treesize of output 456 [2021-11-23 03:44:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:44:56,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:44:56,411 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:44:56,412 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 525 treesize of output 510 [2021-11-23 03:44:56,642 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:44:56,642 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 25 treesize of output 29 [2021-11-23 03:44:56,690 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-23 03:44:56,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 87 [2021-11-23 03:44:56,710 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:44:56,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:44:56,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:44:56,858 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:44:56,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:44:56,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:56,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:44:56,913 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 11 treesize of output 7 [2021-11-23 03:44:57,074 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:44:57,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:44:57,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:44:57,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:44:57,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:44:57,252 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 [2021-11-23 03:44:57,263 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 [2021-11-23 03:44:57,266 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:01,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3282#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (not (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |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) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:01,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:01,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:01,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2021-11-23 03:45:01,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569884401] [2021-11-23 03:45:01,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:01,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 03:45:01,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:01,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 03:45:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:45:01,444 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 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) [2021-11-23 03:45:01,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:01,788 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-23 03:45:01,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:45:01,788 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 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) Word has length 25 [2021-11-23 03:45:01,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:01,789 INFO L225 Difference]: With dead ends: 44 [2021-11-23 03:45:01,789 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 03:45:01,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 03:45:01,791 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:01,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 223 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 185 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-11-23 03:45:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 03:45:01,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 03:45:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:01,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-23 03:45:01,793 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 25 [2021-11-23 03:45:01,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:01,793 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-23 03:45:01,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 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) [2021-11-23 03:45:01,794 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-23 03:45:01,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:45:01,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:01,794 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:01,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:02,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:02,023 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:45:02,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -975215707, now seen corresponding path program 1 times [2021-11-23 03:45:02,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:02,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064024462] [2021-11-23 03:45:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:02,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:02,369 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:02,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064024462] [2021-11-23 03:45:02,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064024462] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:02,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127471461] [2021-11-23 03:45:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:02,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:02,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:02,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:45:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:02,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 03:45:02,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:02,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:02,815 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 25 treesize of output 17 [2021-11-23 03:45:02,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:45:02,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-11-23 03:45:03,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:45:03,042 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 26 treesize of output 10 [2021-11-23 03:45:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:03,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:03,245 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 43 treesize of output 35 [2021-11-23 03:45:03,388 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:45:03,388 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 140 treesize of output 150 [2021-11-23 03:45:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:03,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127471461] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107289274] [2021-11-23 03:45:03,972 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:45:03,973 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:03,973 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:03,973 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:03,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:03,996 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 [2021-11-23 03:45:04,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,029 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 22 treesize of output 30 [2021-11-23 03:45:04,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:04,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:45:04,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:45:04,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,113 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 [2021-11-23 03:45:04,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:45:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,139 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 [2021-11-23 03:45:04,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:45:04,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-23 03:45:04,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:45:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:45:04,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,383 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:04,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 378 treesize of output 360 [2021-11-23 03:45:04,434 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:04,434 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 359 treesize of output 366 [2021-11-23 03:45:04,481 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:04,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 366 treesize of output 373 [2021-11-23 03:45:04,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,653 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:04,653 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 408 treesize of output 409 [2021-11-23 03:45:04,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:04,695 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:45:04,696 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 406 treesize of output 407 [2021-11-23 03:45:04,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:04,738 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:04,739 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 409 treesize of output 410 [2021-11-23 03:45:05,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,017 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:45:05,017 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 410 treesize of output 395 [2021-11-23 03:45:05,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,043 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:45:05,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:45:05,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,068 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:45:05,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 393 treesize of output 386 [2021-11-23 03:45:05,244 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:45:05,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 457 treesize of output 461 [2021-11-23 03:45:05,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,439 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:05,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 378 treesize of output 360 [2021-11-23 03:45:05,476 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:05,477 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 359 treesize of output 366 [2021-11-23 03:45:05,527 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:05,528 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 366 treesize of output 373 [2021-11-23 03:45:05,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:05,878 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:45:05,878 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 1231 treesize of output 1180 [2021-11-23 03:45:05,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,931 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:05,932 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 1222 treesize of output 1217 [2021-11-23 03:45:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:05,987 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:05,987 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 1214 treesize of output 1209 [2021-11-23 03:45:06,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,540 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:45:06,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 556 treesize of output 549 [2021-11-23 03:45:06,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,571 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:45:06,571 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 582 treesize of output 575 [2021-11-23 03:45:06,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:06,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:06,594 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:45:06,594 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 638 treesize of output 615 [2021-11-23 03:45:06,780 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:45:06,780 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 25 treesize of output 29 [2021-11-23 03:45:06,833 INFO L354 Elim1Store]: treesize reduction 61, result has 17.6 percent of original size [2021-11-23 03:45:06,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 87 [2021-11-23 03:45:06,851 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:45:06,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:45:06,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:45:06,993 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:06,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:45:07,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:07,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:07,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:07,197 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:07,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:45:07,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:07,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:45:07,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:07,350 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 [2021-11-23 03:45:07,355 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 [2021-11-23 03:45:07,360 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:11,693 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3585#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#StackHeapBarrier| |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:11,693 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:11,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:11,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2021-11-23 03:45:11,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959066344] [2021-11-23 03:45:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:11,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 03:45:11,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:11,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 03:45:11,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 03:45:11,696 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 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) [2021-11-23 03:45:12,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:12,562 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-11-23 03:45:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:45:12,562 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 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) Word has length 26 [2021-11-23 03:45:12,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:12,563 INFO L225 Difference]: With dead ends: 45 [2021-11-23 03:45:12,563 INFO L226 Difference]: Without dead ends: 45 [2021-11-23 03:45:12,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 843 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=495, Invalid=3045, Unknown=0, NotChecked=0, Total=3540 [2021-11-23 03:45:12,565 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 84 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:12,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 199 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 335 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2021-11-23 03:45:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-23 03:45:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-23 03:45:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:12,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-11-23 03:45:12,568 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 26 [2021-11-23 03:45:12,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:12,568 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-11-23 03:45:12,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 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) [2021-11-23 03:45:12,569 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-11-23 03:45:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:45:12,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:12,569 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-23 03:45:12,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:12,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 03:45:12,783 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:45:12,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:12,783 INFO L85 PathProgramCache]: Analyzing trace with hash -879420952, now seen corresponding path program 1 times [2021-11-23 03:45:12,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:12,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093632913] [2021-11-23 03:45:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:45:12,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093632913] [2021-11-23 03:45:12,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093632913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:12,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934783900] [2021-11-23 03:45:12,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:12,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:12,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:12,883 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:12,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:45:12,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:45:12,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:13,068 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:45:13,068 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 17 treesize of output 19 [2021-11-23 03:45:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:45:13,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:13,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-23 03:45:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:45:13,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934783900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:45:13,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963915042] [2021-11-23 03:45:13,225 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-23 03:45:13,225 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:13,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:13,225 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:13,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:13,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,267 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 [2021-11-23 03:45:13,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-23 03:45:13,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:45:13,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:13,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,379 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 [2021-11-23 03:45:13,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:45:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:45:13,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:13,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:45:13,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:13,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:45:13,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,465 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 [2021-11-23 03:45:13,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:45:13,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:13,652 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-23 03:45:13,653 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 378 treesize of output 370 [2021-11-23 03:45:13,704 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:13,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 379 [2021-11-23 03:45:13,753 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:13,753 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 379 treesize of output 386 [2021-11-23 03:45:13,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,005 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-23 03:45:14,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 418 treesize of output 423 [2021-11-23 03:45:14,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,048 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:14,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 425 treesize of output 426 [2021-11-23 03:45:14,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,091 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:14,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 423 treesize of output 424 [2021-11-23 03:45:14,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,506 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:45:14,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 549 treesize of output 542 [2021-11-23 03:45:14,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,529 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-23 03:45:14,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 557 treesize of output 534 [2021-11-23 03:45:14,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:14,557 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:45:14,557 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 538 treesize of output 531 [2021-11-23 03:45:14,751 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:45:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 447 treesize of output 451 [2021-11-23 03:45:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:14,965 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-23 03:45:14,965 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 378 treesize of output 370 [2021-11-23 03:45:15,002 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:15,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 372 treesize of output 379 [2021-11-23 03:45:15,036 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:15,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 386 [2021-11-23 03:45:15,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,386 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-23 03:45:15,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 742 treesize of output 731 [2021-11-23 03:45:15,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,433 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:15,433 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 749 treesize of output 744 [2021-11-23 03:45:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,485 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:15,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 741 treesize of output 736 [2021-11-23 03:45:15,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:15,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,921 INFO L354 Elim1Store]: treesize reduction 79, result has 8.1 percent of original size [2021-11-23 03:45:15,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 578 treesize of output 555 [2021-11-23 03:45:15,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,950 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:45:15,951 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 559 treesize of output 552 [2021-11-23 03:45:15,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:15,980 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:45:15,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 609 treesize of output 602 [2021-11-23 03:45:16,185 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:45:16,185 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 25 treesize of output 29 [2021-11-23 03:45:16,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:45:16,241 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-23 03:45:16,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 91 [2021-11-23 03:45:16,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:16,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:45:16,253 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 2 case distinctions, treesize of input 76 treesize of output 54 [2021-11-23 03:45:16,425 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:16,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:45:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:16,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:16,631 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:16,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:45:16,658 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 11 treesize of output 7 [2021-11-23 03:45:16,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:45:16,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:16,799 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 [2021-11-23 03:45:16,805 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 [2021-11-23 03:45:16,810 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:20,106 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3885#(and (<= 0 |ULTIMATE.start_sll_remove_first_#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) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:20,106 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:20,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:45:20,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2021-11-23 03:45:20,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469232031] [2021-11-23 03:45:20,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:20,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:45:20,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:45:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-11-23 03:45:20,109 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-11-23 03:45:20,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:20,207 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-23 03:45:20,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:45:20,208 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) Word has length 28 [2021-11-23 03:45:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:20,208 INFO L225 Difference]: With dead ends: 44 [2021-11-23 03:45:20,208 INFO L226 Difference]: Without dead ends: 44 [2021-11-23 03:45:20,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-11-23 03:45:20,210 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:20,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 40 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 30 Unchecked, 0.0s Time] [2021-11-23 03:45:20,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-23 03:45:20,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-23 03:45:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-23 03:45:20,212 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 28 [2021-11-23 03:45:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:20,213 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-23 03:45:20,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2021-11-23 03:45:20,213 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-23 03:45:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 03:45:20,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:20,214 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-23 03:45:20,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:20,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:20,423 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:45:20,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:20,423 INFO L85 PathProgramCache]: Analyzing trace with hash 471864012, now seen corresponding path program 2 times [2021-11-23 03:45:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:20,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454418302] [2021-11-23 03:45:20,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:20,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:20,473 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:45:20,474 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:20,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454418302] [2021-11-23 03:45:20,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454418302] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:45:20,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:45:20,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:45:20,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507433946] [2021-11-23 03:45:20,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:45:20,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:45:20,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:20,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:45:20,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:45:20,476 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:20,515 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-11-23 03:45:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:45:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 31 [2021-11-23 03:45:20,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:20,516 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:45:20,516 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:45:20,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:45:20,517 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:20,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:45:20,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:45:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 03:45:20,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:20,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-23 03:45:20,521 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-11-23 03:45:20,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:20,521 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-23 03:45:20,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:20,521 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-23 03:45:20,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:45:20,522 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:20,522 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:20,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 03:45:20,523 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:45:20,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:20,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487377, now seen corresponding path program 1 times [2021-11-23 03:45:20,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:20,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865341177] [2021-11-23 03:45:20,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:20,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:20,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:21,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865341177] [2021-11-23 03:45:21,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865341177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29015273] [2021-11-23 03:45:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:21,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:21,596 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:21,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:45:21,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-23 03:45:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:22,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:22,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 03:45:22,248 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-23 03:45:22,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 60 [2021-11-23 03:45:22,964 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 25 treesize of output 17 [2021-11-23 03:45:23,569 INFO L354 Elim1Store]: treesize reduction 55, result has 14.1 percent of original size [2021-11-23 03:45:23,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 70 [2021-11-23 03:45:24,553 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-11-23 03:45:24,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 58 [2021-11-23 03:45:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:25,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:45:25,877 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 82 [2021-11-23 03:45:27,071 INFO L354 Elim1Store]: treesize reduction 11, result has 88.2 percent of original size [2021-11-23 03:45:27,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 75298 treesize of output 73279 [2021-11-23 03:45:29,302 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-23 03:45:29,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1101640428] [2021-11-23 03:45:29,304 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-23 03:45:29,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:45:29,304 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:45:29,304 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:45:29,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:45:29,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,325 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 [2021-11-23 03:45:29,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,348 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 22 treesize of output 30 [2021-11-23 03:45:29,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:29,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:45:29,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:29,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 [2021-11-23 03:45:29,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,433 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 [2021-11-23 03:45:29,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,456 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 [2021-11-23 03:45:29,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:29,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select 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 [2021-11-23 03:45:29,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:29,508 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 [2021-11-23 03:45:29,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,526 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 [2021-11-23 03:45:29,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-23 03:45:29,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:29,647 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:29,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 371 treesize of output 353 [2021-11-23 03:45:29,682 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:29,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 352 treesize of output 359 [2021-11-23 03:45:29,717 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:29,717 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 359 treesize of output 366 [2021-11-23 03:45:30,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:30,102 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:30,103 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 1203 treesize of output 1198 [2021-11-23 03:45:30,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:30,152 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:30,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1195 treesize of output 1190 [2021-11-23 03:45:30,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:30,207 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:45:30,207 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 1187 treesize of output 1136 [2021-11-23 03:45:30,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:30,736 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:45:30,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 549 treesize of output 542 [2021-11-23 03:45:30,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:30,773 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:45:30,773 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 569 treesize of output 562 [2021-11-23 03:45:30,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:30,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:30,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:30,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:30,805 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:45:30,806 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 619 treesize of output 596 [2021-11-23 03:45:30,989 INFO L354 Elim1Store]: treesize reduction 184, result has 14.8 percent of original size [2021-11-23 03:45:30,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 453 treesize of output 457 [2021-11-23 03:45:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,172 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:31,172 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 371 treesize of output 353 [2021-11-23 03:45:31,209 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:31,209 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 352 treesize of output 359 [2021-11-23 03:45:31,244 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-23 03:45:31,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 366 [2021-11-23 03:45:31,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,410 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:31,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 401 treesize of output 402 [2021-11-23 03:45:31,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:31,452 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 03:45:31,453 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 399 treesize of output 400 [2021-11-23 03:45:31,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,493 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-23 03:45:31,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 402 treesize of output 403 [2021-11-23 03:45:31,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:31,754 INFO L354 Elim1Store]: treesize reduction 51, result has 15.0 percent of original size [2021-11-23 03:45:31,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 422 treesize of output 415 [2021-11-23 03:45:31,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:31,783 INFO L354 Elim1Store]: treesize reduction 75, result has 16.7 percent of original size [2021-11-23 03:45:31,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 448 treesize of output 441 [2021-11-23 03:45:31,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:31,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:31,809 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-23 03:45:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 504 treesize of output 489 [2021-11-23 03:45:32,013 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-23 03:45:32,013 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 25 treesize of output 29 [2021-11-23 03:45:32,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:32,064 INFO L354 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2021-11-23 03:45:32,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 91 [2021-11-23 03:45:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:32,076 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:45:32,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 54 [2021-11-23 03:45:32,215 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:32,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-23 03:45:32,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:32,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:32,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:32,419 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-23 03:45:32,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 38 treesize of output 53 [2021-11-23 03:45:32,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:32,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-23 03:45:32,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-23 03:45:32,505 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 34 treesize of output 31 [2021-11-23 03:45:32,641 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 [2021-11-23 03:45:32,648 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 [2021-11-23 03:45:32,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:45:38,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4297#(and (< |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) (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) (<= |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|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_20| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_20|) (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_20|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_20|) 0) 0))) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-23 03:45:38,298 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:45:38,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:45:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-23 03:45:38,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459747107] [2021-11-23 03:45:38,299 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-23 03:45:38,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:45:38,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:45:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:45:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=4987, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 03:45:38,301 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:45:40,108 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-23 03:45:40,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 03:45:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 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 [2021-11-23 03:45:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:45:40,109 INFO L225 Difference]: With dead ends: 62 [2021-11-23 03:45:40,109 INFO L226 Difference]: Without dead ends: 61 [2021-11-23 03:45:40,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=409, Invalid=7073, Unknown=0, NotChecked=0, Total=7482 [2021-11-23 03:45:40,112 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 37 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:45:40,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 75 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:45:40,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-23 03:45:40,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-23 03:45:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 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) [2021-11-23 03:45:40,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-23 03:45:40,115 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 32 [2021-11-23 03:45:40,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:45:40,115 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-23 03:45:40,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:45:40,116 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-23 03:45:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 03:45:40,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:45:40,116 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:45:40,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:45:40,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 03:45:40,339 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-23 03:45:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:45:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487312, now seen corresponding path program 1 times [2021-11-23 03:45:40,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:45:40,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289623914] [2021-11-23 03:45:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:40,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:45:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:45:41,636 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:45:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289623914] [2021-11-23 03:45:41,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289623914] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:45:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519626928] [2021-11-23 03:45:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:45:41,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:45:41,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:45:41,637 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:45:41,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c03e77b-3379-404a-a57d-4aa17a7d3d79/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 03:45:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:45:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-23 03:45:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:45:41,752 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 [2021-11-23 03:45:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:41,836 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:45:41,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2021-11-23 03:45:42,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2021-11-23 03:45:42,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:45:42,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:45:42,133 INFO L354 Elim1Store]: treesize reduction 42, result has 43.2 percent of original size [2021-11-23 03:45:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 50 [2021-11-23 03:45:42,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:42,289 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:42,289 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 21 treesize of output 20 [2021-11-23 03:45:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:42,320 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:45:42,320 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 21 treesize of output 20 [2021-11-23 03:45:42,454 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:42,455 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 30 treesize of output 21 [2021-11-23 03:45:42,471 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:45:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2021-11-23 03:45:42,612 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-11-23 03:45:42,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 87 [2021-11-23 03:45:42,636 INFO L354 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2021-11-23 03:45:42,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 124 [2021-11-23 03:45:47,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:45:47,611 INFO L354 Elim1Store]: treesize reduction 132, result has 35.3 percent of original size [2021-11-23 03:45:47,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 181 treesize of output 229 [2021-11-23 03:45:49,369 INFO L354 Elim1Store]: treesize reduction 183, result has 11.6 percent of original size [2021-11-23 03:45:49,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 233 treesize of output 142 [2021-11-23 03:45:49,376 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-23 03:45:49,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 168 [2021-11-23 03:46:20,372 INFO L354 Elim1Store]: treesize reduction 84, result has 25.7 percent of original size [2021-11-23 03:46:20,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 161 treesize of output 169 [2021-11-23 03:46:21,648 INFO L354 Elim1Store]: treesize reduction 115, result has 2.5 percent of original size [2021-11-23 03:46:21,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 108 treesize of output 81 [2021-11-23 03:46:21,661 INFO L354 Elim1Store]: treesize reduction 61, result has 15.3 percent of original size [2021-11-23 03:46:21,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 87 treesize of output 84 [2021-11-23 03:46:21,812 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 03:46:21,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 51 [2021-11-23 03:46:21,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:46:21,818 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 38 treesize of output 22 [2021-11-23 03:46:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:46:21,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:46:30,711 INFO L354 Elim1Store]: treesize reduction 91, result has 94.8 percent of original size [2021-11-23 03:46:30,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 222562 treesize of output 216306 [2021-11-23 03:50:06,378 WARN L227 SmtUtils]: Spent 3.51m on a formula simplification. DAG size of input: 4398 DAG size of output: 1953 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-23 03:50:06,393 INFO L354 Elim1Store]: treesize reduction 9941, result has 30.4 percent of original size [2021-11-23 03:50:06,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 51 select indices, 51 select index equivalence classes, 0 disjoint index pairs (out of 1275 index pairs), introduced 77 new quantified variables, introduced 1275 case distinctions, treesize of input 1305338153 treesize of output 1164559622