./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:21:24,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:21:24,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:21:24,941 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:21:24,942 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:21:24,944 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:21:24,946 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:21:24,948 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:21:24,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:21:24,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:21:24,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:21:24,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:21:24,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:21:24,964 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:21:24,966 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:21:24,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:21:24,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:21:24,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:21:24,979 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:21:24,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:21:24,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:21:24,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:21:24,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:21:24,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:21:24,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:21:25,003 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:21:25,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:21:25,005 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:21:25,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:21:25,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:21:25,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:21:25,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:21:25,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:21:25,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:21:25,015 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:21:25,015 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:21:25,016 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:21:25,016 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:21:25,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:21:25,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:21:25,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:21:25,019 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:21:25,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:21:25,064 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:21:25,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:21:25,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:21:25,065 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:21:25,065 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:21:25,065 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:21:25,066 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:21:25,066 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:21:25,066 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:21:25,066 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:21:25,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:21:25,067 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:21:25,067 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:21:25,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:21:25,068 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:21:25,068 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:21:25,068 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:21:25,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:21:25,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:21:25,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:21:25,069 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:21:25,070 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:21:25,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:21:25,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:21:25,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:21:25,071 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:21:25,071 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:21:25,071 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:21:25,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:21:25,072 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:21:25,072 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:21:25,072 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:21:25,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:21:25,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:21:25,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:25,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:21:25,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:21:25,073 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:21:25,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:21:25,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:21:25,074 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:21:25,074 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_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93d1510274ba16ddd1276e8e93ff0a644bf6fb4a262c4c9dde32fe8591d5ce8c [2021-11-25 20:21:25,373 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:21:25,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:21:25,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:21:25,412 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:21:25,417 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:21:25,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2021-11-25 20:21:25,501 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/data/0ae8c43f1/e8ecdf3b05a74ce780feda736d7ba7d7/FLAG967f063e9 [2021-11-25 20:21:26,014 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:21:26,015 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/sv-benchmarks/c/list-simple/dll2n_insert_equal.i [2021-11-25 20:21:26,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/data/0ae8c43f1/e8ecdf3b05a74ce780feda736d7ba7d7/FLAG967f063e9 [2021-11-25 20:21:26,369 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/data/0ae8c43f1/e8ecdf3b05a74ce780feda736d7ba7d7 [2021-11-25 20:21:26,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:21:26,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:21:26,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:26,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:21:26,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:21:26,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:26,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@520824c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26, skipping insertion in model container [2021-11-25 20:21:26,382 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:26,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:21:26,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:21:26,829 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_b7d29ba9-c326-402a-b0e2-6366b63fba8a/sv-benchmarks/c/list-simple/dll2n_insert_equal.i[24706,24719] [2021-11-25 20:21:26,835 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:26,846 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:21:26,918 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_b7d29ba9-c326-402a-b0e2-6366b63fba8a/sv-benchmarks/c/list-simple/dll2n_insert_equal.i[24706,24719] [2021-11-25 20:21:26,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:21:26,964 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:21:26,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26 WrapperNode [2021-11-25 20:21:26,965 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:21:26,967 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:26,967 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:21:26,967 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:21:26,975 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,049 INFO L137 Inliner]: procedures = 127, calls = 44, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 139 [2021-11-25 20:21:27,051 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:21:27,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:21:27,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:21:27,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:21:27,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,065 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,079 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:21:27,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:21:27,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:21:27,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:21:27,088 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (1/1) ... [2021-11-25 20:21:27,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:21:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:27,140 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:21:27,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:21:27,181 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-25 20:21:27,181 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-25 20:21:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:21:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:21:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:21:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:21:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:21:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:21:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:21:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:21:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 20:21:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:21:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:21:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:21:27,290 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:21:27,291 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:21:27,341 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-25 20:21:27,828 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:21:27,906 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:21:27,906 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-25 20:21:27,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:27 BoogieIcfgContainer [2021-11-25 20:21:27,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:21:27,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:21:27,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:21:27,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:21:27,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:21:26" (1/3) ... [2021-11-25 20:21:27,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b959d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:27, skipping insertion in model container [2021-11-25 20:21:27,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:21:26" (2/3) ... [2021-11-25 20:21:27,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b959d16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:21:27, skipping insertion in model container [2021-11-25 20:21:27,918 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:21:27" (3/3) ... [2021-11-25 20:21:27,921 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_insert_equal.i [2021-11-25 20:21:27,930 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:21:27,931 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 53 error locations. [2021-11-25 20:21:27,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:21:27,975 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:21:27,976 INFO L340 AbstractCegarLoop]: Starting to check reachability of 53 error locations. [2021-11-25 20:21:27,992 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 100 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:27,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:28,000 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:28,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:28,001 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:28,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:28,006 INFO L85 PathProgramCache]: Analyzing trace with hash 7314878, now seen corresponding path program 1 times [2021-11-25 20:21:28,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:28,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965820524] [2021-11-25 20:21:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:28,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:28,184 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:28,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965820524] [2021-11-25 20:21:28,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965820524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:28,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:28,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:28,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253287923] [2021-11-25 20:21:28,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:28,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:28,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:28,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:28,224 INFO L87 Difference]: Start difference. First operand has 102 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 100 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:28,505 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2021-11-25 20:21:28,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:28,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 20:21:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:28,519 INFO L225 Difference]: With dead ends: 179 [2021-11-25 20:21:28,520 INFO L226 Difference]: Without dead ends: 173 [2021-11-25 20:21:28,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:28,527 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 97 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:28,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 169 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-11-25 20:21:28,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2021-11-25 20:21:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-25 20:21:28,592 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 4 [2021-11-25 20:21:28,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:28,592 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-25 20:21:28,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-25 20:21:28,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:28,593 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:28,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:28,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:21:28,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:28,598 INFO L85 PathProgramCache]: Analyzing trace with hash 7314879, now seen corresponding path program 1 times [2021-11-25 20:21:28,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:28,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879283918] [2021-11-25 20:21:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:28,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:28,663 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:28,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879283918] [2021-11-25 20:21:28,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879283918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:28,664 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:28,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:28,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844442939] [2021-11-25 20:21:28,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:28,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:28,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:28,667 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:28,824 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2021-11-25 20:21:28,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:28,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-25 20:21:28,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:28,832 INFO L225 Difference]: With dead ends: 172 [2021-11-25 20:21:28,833 INFO L226 Difference]: Without dead ends: 172 [2021-11-25 20:21:28,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:28,839 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 95 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:28,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 164 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-25 20:21:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 91. [2021-11-25 20:21:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 44 states have (on average 2.25) internal successors, (99), 90 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 99 transitions. [2021-11-25 20:21:28,854 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 99 transitions. Word has length 4 [2021-11-25 20:21:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:28,855 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 99 transitions. [2021-11-25 20:21:28,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:28,856 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 99 transitions. [2021-11-25 20:21:28,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 20:21:28,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:28,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 20:21:28,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:21:28,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:28,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:28,858 INFO L85 PathProgramCache]: Analyzing trace with hash 7516751, now seen corresponding path program 1 times [2021-11-25 20:21:28,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:28,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641541055] [2021-11-25 20:21:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:28,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:28,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:28,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:28,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641541055] [2021-11-25 20:21:28,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641541055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:28,942 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:28,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:28,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885728470] [2021-11-25 20:21:28,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:28,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:28,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:28,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:28,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:28,948 INFO L87 Difference]: Start difference. First operand 91 states and 99 transitions. 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) [2021-11-25 20:21:28,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:28,998 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2021-11-25 20:21:28,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:28,999 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 [2021-11-25 20:21:28,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,000 INFO L225 Difference]: With dead ends: 101 [2021-11-25 20:21:29,000 INFO L226 Difference]: Without dead ends: 101 [2021-11-25 20:21:29,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:29,008 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 10 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 164 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:29,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-11-25 20:21:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 92. [2021-11-25 20:21:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 45 states have (on average 2.2222222222222223) internal successors, (100), 91 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2021-11-25 20:21:29,023 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 4 [2021-11-25 20:21:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:29,023 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2021-11-25 20:21:29,023 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) [2021-11-25 20:21:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2021-11-25 20:21:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-25 20:21:29,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:29,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:29,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:21:29,024 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:29,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:29,025 INFO L85 PathProgramCache]: Analyzing trace with hash -540200382, now seen corresponding path program 1 times [2021-11-25 20:21:29,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:29,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849503405] [2021-11-25 20:21:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:29,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:29,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:29,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849503405] [2021-11-25 20:21:29,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849503405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:29,130 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:29,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:29,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371315875] [2021-11-25 20:21:29,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:29,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:29,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:29,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:29,132 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:29,198 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2021-11-25 20:21:29,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:29,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-25 20:21:29,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,204 INFO L225 Difference]: With dead ends: 98 [2021-11-25 20:21:29,204 INFO L226 Difference]: Without dead ends: 98 [2021-11-25 20:21:29,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:29,211 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 161 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-25 20:21:29,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-25 20:21:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 50 states have (on average 2.1) internal successors, (105), 96 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2021-11-25 20:21:29,225 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 8 [2021-11-25 20:21:29,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:29,225 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-11-25 20:21:29,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,225 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2021-11-25 20:21:29,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:21:29,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:29,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:29,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:21:29,227 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:29,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:29,229 INFO L85 PathProgramCache]: Analyzing trace with hash 137862466, now seen corresponding path program 1 times [2021-11-25 20:21:29,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:29,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698214501] [2021-11-25 20:21:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:21:29,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:29,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698214501] [2021-11-25 20:21:29,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698214501] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:29,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:29,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:29,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324640452] [2021-11-25 20:21:29,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:29,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:29,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:29,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:29,333 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:29,419 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2021-11-25 20:21:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:29,419 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:21:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:29,420 INFO L225 Difference]: With dead ends: 104 [2021-11-25 20:21:29,420 INFO L226 Difference]: Without dead ends: 104 [2021-11-25 20:21:29,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:29,427 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 79 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:29,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 59 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:29,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-25 20:21:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2021-11-25 20:21:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 50 states have (on average 2.04) internal successors, (102), 93 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2021-11-25 20:21:29,439 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 11 [2021-11-25 20:21:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:29,440 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2021-11-25 20:21:29,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2021-11-25 20:21:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:21:29,441 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:29,441 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:29,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 20:21:29,441 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:29,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:29,442 INFO L85 PathProgramCache]: Analyzing trace with hash 137862467, now seen corresponding path program 1 times [2021-11-25 20:21:29,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:29,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656402049] [2021-11-25 20:21:29,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:29,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:29,551 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:29,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656402049] [2021-11-25 20:21:29,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656402049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:29,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927039705] [2021-11-25 20:21:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:29,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:29,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:29,554 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:29,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:21:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:29,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 20:21:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:29,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:29,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927039705] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:29,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026439593] [2021-11-25 20:21:29,809 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 20:21:29,809 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:21:29,814 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:21:29,819 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:21:29,819 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:21:29,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:21:29,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:29,944 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 [2021-11-25 20:21:30,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:21:30,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:30,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:30,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:30,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:30,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:30,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,223 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 23 treesize of output 22 [2021-11-25 20:21:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:21:30,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:30,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,384 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 [2021-11-25 20:21:30,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:30,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:30,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:30,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:30,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,837 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:21:30,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 376 [2021-11-25 20:21:30,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,901 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:21:30,902 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 389 treesize of output 388 [2021-11-25 20:21:30,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:30,955 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:21:30,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2021-11-25 20:21:31,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,145 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 [2021-11-25 20:21:31,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:31,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:31,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:31,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:31,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,483 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:21:31,484 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 389 treesize of output 388 [2021-11-25 20:21:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,517 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:21:31,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 376 [2021-11-25 20:21:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:31,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:31,556 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:21:31,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 389 treesize of output 388 [2021-11-25 20:21:31,948 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-25 20:21:31,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 313 treesize of output 320 [2021-11-25 20:21:32,393 INFO L354 Elim1Store]: treesize reduction 64, result has 19.0 percent of original size [2021-11-25 20:21:32,394 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 4 case distinctions, treesize of input 389 treesize of output 386 [2021-11-25 20:21:32,442 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 20:21:32,442 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 3 case distinctions, treesize of input 393 treesize of output 384 [2021-11-25 20:21:32,488 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-25 20:21:32,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 384 [2021-11-25 20:21:32,561 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:21:35,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1026439593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:35,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:35,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2021-11-25 20:21:35,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726870502] [2021-11-25 20:21:35,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:35,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:21:35,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:35,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:21:35,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:21:35,422 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:36,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:36,535 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-25 20:21:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 20:21:36,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 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 11 [2021-11-25 20:21:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:36,536 INFO L225 Difference]: With dead ends: 105 [2021-11-25 20:21:36,537 INFO L226 Difference]: Without dead ends: 105 [2021-11-25 20:21:36,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:21:36,538 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 9 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:36,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 175 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:21:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-25 20:21:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2021-11-25 20:21:36,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.9298245614035088) internal successors, (110), 100 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:36,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 110 transitions. [2021-11-25 20:21:36,542 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 110 transitions. Word has length 11 [2021-11-25 20:21:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:36,543 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 110 transitions. [2021-11-25 20:21:36,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:36,543 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 110 transitions. [2021-11-25 20:21:36,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 20:21:36,544 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:36,544 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:21:36,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:36,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:21:36,760 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1416457141, now seen corresponding path program 1 times [2021-11-25 20:21:36,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:36,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780050214] [2021-11-25 20:21:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:36,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:36,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:36,846 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:36,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780050214] [2021-11-25 20:21:36,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780050214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:36,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821127115] [2021-11-25 20:21:36,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:36,847 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:36,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:36,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:36,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:21:36,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:21:36,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:36,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:21:36,986 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:21:36,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:21:37,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:37,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821127115] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816144478] [2021-11-25 20:21:37,121 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:21:37,121 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:21:37,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:21:37,122 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:21:37,122 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:21:37,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:21:37,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,186 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 [2021-11-25 20:21:37,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:37,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:21:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:37,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:37,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:37,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,351 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 23 treesize of output 22 [2021-11-25 20:21:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,374 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 23 treesize of output 22 [2021-11-25 20:21:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,447 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 27 treesize of output 38 [2021-11-25 20:21:37,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:37,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:37,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:37,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:37,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:37,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:37,722 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:21:37,722 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 381 treesize of output 380 [2021-11-25 20:21:37,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:37,760 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:21:37,760 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 387 treesize of output 368 [2021-11-25 20:21:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:37,799 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:21:37,800 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 381 treesize of output 380 [2021-11-25 20:21:37,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:37,962 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 27 treesize of output 38 [2021-11-25 20:21:38,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:38,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:38,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:38,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:38,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:38,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:38,221 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:21:38,222 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 381 treesize of output 380 [2021-11-25 20:21:38,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,236 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:38,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:38,255 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:21:38,256 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 381 treesize of output 380 [2021-11-25 20:21:38,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:38,286 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:38,295 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:21:38,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 387 treesize of output 368 [2021-11-25 20:21:38,649 INFO L354 Elim1Store]: treesize reduction 92, result has 21.4 percent of original size [2021-11-25 20:21:38,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 310 treesize of output 317 [2021-11-25 20:21:39,364 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-25 20:21:39,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 723 treesize of output 700 [2021-11-25 20:21:39,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:39,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 727 treesize of output 710 [2021-11-25 20:21:39,415 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:39,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 727 treesize of output 710 [2021-11-25 20:21:39,534 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:21:42,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [816144478] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:42,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:42,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 3, 4] total 13 [2021-11-25 20:21:42,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156621830] [2021-11-25 20:21:42,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:42,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:42,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:42,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:42,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:21:42,381 INFO L87 Difference]: Start difference. First operand 101 states and 110 transitions. Second operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:43,029 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2021-11-25 20:21:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:21:43,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 20:21:43,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:43,031 INFO L225 Difference]: With dead ends: 103 [2021-11-25 20:21:43,031 INFO L226 Difference]: Without dead ends: 103 [2021-11-25 20:21:43,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-25 20:21:43,032 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 5 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:43,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:21:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-25 20:21:43,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-25 20:21:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.9137931034482758) internal successors, (111), 101 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2021-11-25 20:21:43,035 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 15 [2021-11-25 20:21:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:43,036 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2021-11-25 20:21:43,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2021-11-25 20:21:43,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 20:21:43,037 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:43,037 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:43,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:43,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:21:43,248 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:43,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:43,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1136581807, now seen corresponding path program 1 times [2021-11-25 20:21:43,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:43,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291860769] [2021-11-25 20:21:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:43,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:43,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291860769] [2021-11-25 20:21:43,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291860769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:43,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:43,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:21:43,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680053429] [2021-11-25 20:21:43,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:43,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:43,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:43,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:43,328 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:43,382 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2021-11-25 20:21:43,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:43,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-25 20:21:43,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:43,384 INFO L225 Difference]: With dead ends: 99 [2021-11-25 20:21:43,384 INFO L226 Difference]: Without dead ends: 99 [2021-11-25 20:21:43,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:43,385 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 79 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:43,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 55 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-25 20:21:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-11-25 20:21:43,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 98 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2021-11-25 20:21:43,388 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 19 [2021-11-25 20:21:43,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:43,388 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2021-11-25 20:21:43,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.5) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:43,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2021-11-25 20:21:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:21:43,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:43,389 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:43,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:21:43,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:43,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:43,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1613545352, now seen corresponding path program 1 times [2021-11-25 20:21:43,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:43,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233893301] [2021-11-25 20:21:43,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:43,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:43,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:21:43,510 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233893301] [2021-11-25 20:21:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233893301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984721046] [2021-11-25 20:21:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:43,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:43,515 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:21:43,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:43,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-25 20:21:43,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:43,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:21:43,663 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:21:43,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-11-25 20:21:43,720 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:21:43,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2021-11-25 20:21:43,870 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:21:43,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 20:21:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:21:43,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:21:44,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984721046] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:21:44,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2036763260] [2021-11-25 20:21:44,041 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:21:44,041 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:21:44,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:21:44,041 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:21:44,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:21:44,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:21:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,114 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 [2021-11-25 20:21:44,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:44,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:21:44,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:44,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:44,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:44,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,265 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 23 treesize of output 22 [2021-11-25 20:21:44,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:21:44,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,293 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 23 treesize of output 22 [2021-11-25 20:21:44,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,375 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 27 treesize of output 38 [2021-11-25 20:21:44,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:44,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:44,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-11-25 20:21:44,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:44,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:44,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-25 20:21:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 20:21:44,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-11-25 20:21:44,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:44,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:44,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:44,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-11-25 20:21:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:44,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:44,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2021-11-25 20:21:45,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,051 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 [2021-11-25 20:21:45,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 38 [2021-11-25 20:21:45,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2021-11-25 20:21:45,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:45,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2021-11-25 20:21:45,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 20:21:45,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:45,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2021-11-25 20:21:45,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-11-25 20:21:45,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 49 [2021-11-25 20:21:45,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:21:45,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:21:45,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:21:45,764 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 19 treesize of output 1 [2021-11-25 20:21:45,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 20:21:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-25 20:21:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-25 20:21:45,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:45,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 20:21:45,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:45,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-25 20:21:45,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:45,950 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-25 20:21:45,950 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 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-25 20:21:45,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:45,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:45,988 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-25 20:21:45,988 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 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-25 20:21:46,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:21:46,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:21:46,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:21:46,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:46,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:21:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:21:46,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:46,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:46,227 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:21:46,227 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 230 treesize of output 216 [2021-11-25 20:21:46,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:21:46,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-25 20:21:46,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:46,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:21:46,344 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:21:46,345 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 230 treesize of output 216 [2021-11-25 20:21:46,418 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:21:49,604 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2165#(and (<= 1 |ULTIMATE.start_dll_create_~data#1|) (= |ULTIMATE.start_node_create_~data#1| |ULTIMATE.start_node_create_#in~data#1|) (= (select (select |#memory_int| |ULTIMATE.start_node_create_~temp~0#1.base|) |ULTIMATE.start_node_create_~temp~0#1.offset|) |ULTIMATE.start_node_create_~data#1|) (<= 2 |ULTIMATE.start_dll_create_#in~len#1|) (= |ULTIMATE.start_dll_insert_#in~data#1| |ULTIMATE.start_main_~data~0#1|) (= |ULTIMATE.start_dll_create_~head~0#1.offset| |ULTIMATE.start_dll_create_#res#1.offset|) (= (select |#valid| |ULTIMATE.start_node_create_~temp~0#1.base|) 1) (= |ULTIMATE.start_main_~#s~0#1.offset| |ULTIMATE.start_dll_insert_#in~head#1.offset|) (= |ULTIMATE.start_node_create_#res#1.base| |ULTIMATE.start_dll_insert_~new_node~0#1.base|) (= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= |ULTIMATE.start_dll_insert_#in~data#1| |ULTIMATE.start_dll_insert_~data#1|) (= |ULTIMATE.start_node_create_~temp~0#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (= |ULTIMATE.start_dll_insert_~snd_to_last~0#1.offset| 0) (= 12 (select |#length| |ULTIMATE.start_node_create_~temp~0#1.base|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (<= |ULTIMATE.start_dll_create_~data#1| 1) (= |ULTIMATE.start_dll_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= |ULTIMATE.start_dll_create_~head~0#1.base| |ULTIMATE.start_dll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_dll_create_#res#1.offset|) (= |ULTIMATE.start_node_create_#res#1.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_dll_create_~len#1|) (= |ULTIMATE.start_dll_insert_#in~head#1.base| |ULTIMATE.start_dll_insert_~head#1.base|) (<= |ULTIMATE.start_dll_create_#in~len#1| 2) (= |ULTIMATE.start_node_create_#in~data#1| |ULTIMATE.start_dll_insert_~data#1|) (= |ULTIMATE.start_dll_insert_~new_node~0#1.offset| |ULTIMATE.start_node_create_#res#1.offset|) (<= |ULTIMATE.start_dll_create_~len#1| 0) (<= 1 |ULTIMATE.start_dll_create_#in~data#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= (select |#valid| |ULTIMATE.start_dll_insert_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 4)) 0) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (< |ULTIMATE.start_node_create_~temp~0#1.base| |#StackHeapBarrier|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_dll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_node_create_~temp~0#1.base|) (+ |ULTIMATE.start_node_create_~temp~0#1.offset| 8)) 0) (<= |ULTIMATE.start_dll_create_~head~0#1.offset| 0) (= |ULTIMATE.start_dll_insert_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |ULTIMATE.start_dll_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_insert_~index#1| |ULTIMATE.start_dll_insert_#in~index#1|) (= |ULTIMATE.start_dll_insert_~snd_to_last~0#1.base| 0) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (not (= |ULTIMATE.start_node_create_~temp~0#1.base| 0)) (= |ULTIMATE.start_dll_insert_~head#1.offset| |ULTIMATE.start_dll_insert_#in~head#1.offset|) (= |#NULL.base| 0) (= |ULTIMATE.start_dll_insert_#in~index#1| (ite (and (not (= (mod |ULTIMATE.start_main_~len~0#1| 2) 0)) (< |ULTIMATE.start_main_~len~0#1| 0)) (+ (div |ULTIMATE.start_main_~len~0#1| 2) 1) (div |ULTIMATE.start_main_~len~0#1| 2))))' at error location [2021-11-25 20:21:49,604 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:21:49,604 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:21:49,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2021-11-25 20:21:49,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297386159] [2021-11-25 20:21:49,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:21:49,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-25 20:21:49,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:49,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-25 20:21:49,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:21:49,606 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:49,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:49,730 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2021-11-25 20:21:49,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:49,731 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 20:21:49,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:49,732 INFO L225 Difference]: With dead ends: 102 [2021-11-25 20:21:49,732 INFO L226 Difference]: Without dead ends: 102 [2021-11-25 20:21:49,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-11-25 20:21:49,733 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:49,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 62 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-25 20:21:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-25 20:21:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2021-11-25 20:21:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-11-25 20:21:49,737 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 22 [2021-11-25 20:21:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:49,737 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-11-25 20:21:49,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-11-25 20:21:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 20:21:49,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:49,739 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:49,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:21:49,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:49,960 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:49,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:49,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1613545351, now seen corresponding path program 1 times [2021-11-25 20:21:49,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:49,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39703104] [2021-11-25 20:21:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:49,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:50,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:50,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39703104] [2021-11-25 20:21:50,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39703104] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:50,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:50,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:50,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445530534] [2021-11-25 20:21:50,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:50,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:50,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:50,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:50,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:50,149 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:50,227 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2021-11-25 20:21:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:21:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 20:21:50,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:50,228 INFO L225 Difference]: With dead ends: 85 [2021-11-25 20:21:50,228 INFO L226 Difference]: Without dead ends: 85 [2021-11-25 20:21:50,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:50,229 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 201 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:50,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 38 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:50,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-25 20:21:50,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-25 20:21:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 84 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 94 transitions. [2021-11-25 20:21:50,233 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 94 transitions. Word has length 22 [2021-11-25 20:21:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:50,233 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 94 transitions. [2021-11-25 20:21:50,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,234 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 94 transitions. [2021-11-25 20:21:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 20:21:50,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:50,234 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2021-11-25 20:21:50,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:21:50,235 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:50,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:50,235 INFO L85 PathProgramCache]: Analyzing trace with hash -231795423, now seen corresponding path program 1 times [2021-11-25 20:21:50,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:50,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796940154] [2021-11-25 20:21:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:50,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,298 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:50,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:50,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796940154] [2021-11-25 20:21:50,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796940154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:50,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:50,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:50,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283435470] [2021-11-25 20:21:50,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:50,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:50,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:50,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:50,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:50,300 INFO L87 Difference]: Start difference. First operand 85 states and 94 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:50,327 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-11-25 20:21:50,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:50,327 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 20:21:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:50,328 INFO L225 Difference]: With dead ends: 79 [2021-11-25 20:21:50,328 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 20:21:50,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:50,329 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 137 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:50,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 83 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 20:21:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-25 20:21:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.5961538461538463) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-25 20:21:50,332 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 23 [2021-11-25 20:21:50,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:50,333 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-25 20:21:50,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,333 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-25 20:21:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:21:50,334 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:50,334 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:50,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 20:21:50,334 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:50,335 INFO L85 PathProgramCache]: Analyzing trace with hash -133750392, now seen corresponding path program 1 times [2021-11-25 20:21:50,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:50,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382885528] [2021-11-25 20:21:50,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:50,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 20:21:50,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:50,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382885528] [2021-11-25 20:21:50,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382885528] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:50,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:50,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:21:50,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81569227] [2021-11-25 20:21:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:50,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:50,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:50,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:50,480 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:50,766 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2021-11-25 20:21:50,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:21:50,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 20:21:50,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:50,769 INFO L225 Difference]: With dead ends: 138 [2021-11-25 20:21:50,769 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 20:21:50,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-25 20:21:50,770 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 430 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:50,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 113 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:21:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 20:21:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 85. [2021-11-25 20:21:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.7) internal successors, (102), 84 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 102 transitions. [2021-11-25 20:21:50,774 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 102 transitions. Word has length 24 [2021-11-25 20:21:50,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:50,774 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 102 transitions. [2021-11-25 20:21:50,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:50,775 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 102 transitions. [2021-11-25 20:21:50,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:21:50,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:50,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:50,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 20:21:50,777 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:50,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash -133750391, now seen corresponding path program 1 times [2021-11-25 20:21:50,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:50,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470764172] [2021-11-25 20:21:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:50,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:21:50,966 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:50,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470764172] [2021-11-25 20:21:50,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470764172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:50,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:50,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 20:21:50,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003311917] [2021-11-25 20:21:50,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:50,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:21:50,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:21:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:21:50,971 INFO L87 Difference]: Start difference. First operand 85 states and 102 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-25 20:21:51,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,306 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2021-11-25 20:21:51,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:21:51,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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 24 [2021-11-25 20:21:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,308 INFO L225 Difference]: With dead ends: 148 [2021-11-25 20:21:51,308 INFO L226 Difference]: Without dead ends: 148 [2021-11-25 20:21:51,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-25 20:21:51,308 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 336 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 68 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 20:21:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-25 20:21:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 85. [2021-11-25 20:21:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2021-11-25 20:21:51,312 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 24 [2021-11-25 20:21:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,313 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2021-11-25 20:21:51,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2021-11-25 20:21:51,313 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2021-11-25 20:21:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:21:51,318 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,318 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 20:21:51,318 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash 148847712, now seen corresponding path program 1 times [2021-11-25 20:21:51,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427083792] [2021-11-25 20:21:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:51,379 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427083792] [2021-11-25 20:21:51,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427083792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:51,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669817172] [2021-11-25 20:21:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:21:51,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:21:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:51,382 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,413 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-25 20:21:51,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:21:51,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 20:21:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,414 INFO L225 Difference]: With dead ends: 106 [2021-11-25 20:21:51,414 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 20:21:51,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:21:51,415 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 41 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 108 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 20:21:51,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-11-25 20:21:51,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 55 states have (on average 1.5818181818181818) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-11-25 20:21:51,418 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 25 [2021-11-25 20:21:51,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,419 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-11-25 20:21:51,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,419 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-11-25 20:21:51,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:21:51,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,421 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:21:51,422 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,422 INFO L85 PathProgramCache]: Analyzing trace with hash 315022543, now seen corresponding path program 1 times [2021-11-25 20:21:51,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135705352] [2021-11-25 20:21:51,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:51,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135705352] [2021-11-25 20:21:51,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135705352] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:51,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701631167] [2021-11-25 20:21:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:51,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:51,503 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,538 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2021-11-25 20:21:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:21:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,540 INFO L225 Difference]: With dead ends: 77 [2021-11-25 20:21:51,540 INFO L226 Difference]: Without dead ends: 77 [2021-11-25 20:21:51,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:21:51,543 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 177 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 70 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:51,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-25 20:21:51,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-11-25 20:21:51,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 54 states have (on average 1.537037037037037) internal successors, (83), 76 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-11-25 20:21:51,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 26 [2021-11-25 20:21:51,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,546 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-11-25 20:21:51,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-11-25 20:21:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:21:51,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-25 20:21:51,549 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 319331700, now seen corresponding path program 1 times [2021-11-25 20:21:51,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666600717] [2021-11-25 20:21:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:51,633 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666600717] [2021-11-25 20:21:51,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666600717] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,633 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:51,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906639652] [2021-11-25 20:21:51,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:51,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:51,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:51,636 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,703 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2021-11-25 20:21:51,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:51,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:21:51,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,705 INFO L225 Difference]: With dead ends: 84 [2021-11-25 20:21:51,705 INFO L226 Difference]: Without dead ends: 84 [2021-11-25 20:21:51,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:51,706 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 106 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 55 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:51,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-25 20:21:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-11-25 20:21:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 73 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-11-25 20:21:51,710 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 26 [2021-11-25 20:21:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,710 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-11-25 20:21:51,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,711 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-11-25 20:21:51,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:21:51,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,712 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 20:21:51,713 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,713 INFO L85 PathProgramCache]: Analyzing trace with hash 319331701, now seen corresponding path program 1 times [2021-11-25 20:21:51,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864459819] [2021-11-25 20:21:51,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:51,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864459819] [2021-11-25 20:21:51,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864459819] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:51,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111051360] [2021-11-25 20:21:51,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:51,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:51,777 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,805 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-11-25 20:21:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:51,806 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:21:51,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,806 INFO L225 Difference]: With dead ends: 73 [2021-11-25 20:21:51,806 INFO L226 Difference]: Without dead ends: 73 [2021-11-25 20:21:51,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:51,808 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 62 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 107 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:21:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-25 20:21:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-25 20:21:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.471698113207547) internal successors, (78), 72 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 78 transitions. [2021-11-25 20:21:51,811 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 78 transitions. Word has length 26 [2021-11-25 20:21:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,812 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 78 transitions. [2021-11-25 20:21:51,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 78 transitions. [2021-11-25 20:21:51,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:21:51,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-25 20:21:51,814 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1175906809, now seen corresponding path program 1 times [2021-11-25 20:21:51,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286558531] [2021-11-25 20:21:51,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:51,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:51,878 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:51,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286558531] [2021-11-25 20:21:51,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286558531] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:51,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:51,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:51,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828904878] [2021-11-25 20:21:51,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:51,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:51,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:51,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:51,880 INFO L87 Difference]: Start difference. First operand 73 states and 78 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:51,972 INFO L93 Difference]: Finished difference Result 106 states and 115 transitions. [2021-11-25 20:21:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:21:51,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 20:21:51,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:51,973 INFO L225 Difference]: With dead ends: 106 [2021-11-25 20:21:51,973 INFO L226 Difference]: Without dead ends: 106 [2021-11-25 20:21:51,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:51,974 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 73 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:51,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 90 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-25 20:21:51,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-11-25 20:21:51,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.4528301886792452) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-11-25 20:21:51,977 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 27 [2021-11-25 20:21:51,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:51,977 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-11-25 20:21:51,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-11-25 20:21:51,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 20:21:51,977 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:51,978 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:51,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-25 20:21:51,978 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:51,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:51,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1175906810, now seen corresponding path program 1 times [2021-11-25 20:21:51,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:51,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769599372] [2021-11-25 20:21:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:51,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-25 20:21:52,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:52,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769599372] [2021-11-25 20:21:52,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769599372] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:52,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:52,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:21:52,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663602260] [2021-11-25 20:21:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:52,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:21:52,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:21:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:52,055 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:52,125 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-11-25 20:21:52,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:52,125 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-25 20:21:52,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:52,126 INFO L225 Difference]: With dead ends: 71 [2021-11-25 20:21:52,126 INFO L226 Difference]: Without dead ends: 71 [2021-11-25 20:21:52,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:21:52,127 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 50 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:52,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 68 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:52,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-25 20:21:52,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-25 20:21:52,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.4339622641509433) internal successors, (76), 70 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-11-25 20:21:52,130 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 27 [2021-11-25 20:21:52,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:52,130 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-11-25 20:21:52,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,130 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-11-25 20:21:52,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-25 20:21:52,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:52,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:52,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-25 20:21:52,131 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:52,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:52,131 INFO L85 PathProgramCache]: Analyzing trace with hash 2093372776, now seen corresponding path program 1 times [2021-11-25 20:21:52,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:52,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481829023] [2021-11-25 20:21:52,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:52,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:21:52,192 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:52,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481829023] [2021-11-25 20:21:52,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481829023] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:21:52,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:21:52,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:21:52,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861073687] [2021-11-25 20:21:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:21:52,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:21:52,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:21:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:21:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:21:52,194 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:21:52,263 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2021-11-25 20:21:52,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:21:52,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-25 20:21:52,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:21:52,264 INFO L225 Difference]: With dead ends: 68 [2021-11-25 20:21:52,264 INFO L226 Difference]: Without dead ends: 68 [2021-11-25 20:21:52,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:21:52,266 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 102 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:21:52,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 53 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:21:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-25 20:21:52,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-11-25 20:21:52,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 53 states have (on average 1.3773584905660377) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-11-25 20:21:52,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 28 [2021-11-25 20:21:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:21:52,274 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-11-25 20:21:52,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:21:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-11-25 20:21:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:21:52,274 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:21:52,275 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:21:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-25 20:21:52,275 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 49 more)] === [2021-11-25 20:21:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:21:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 743268797, now seen corresponding path program 1 times [2021-11-25 20:21:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:21:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980934515] [2021-11-25 20:21:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:52,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:21:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:52,667 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:21:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980934515] [2021-11-25 20:21:52,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980934515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:21:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525514611] [2021-11-25 20:21:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:21:52,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:21:52,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:21:52,675 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:21:52,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b7d29ba9-c326-402a-b0e2-6366b63fba8a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:21:52,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:21:52,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-25 20:21:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:21:52,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:21:53,088 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:21:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:21:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:21:53,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,241 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 23 treesize of output 22 [2021-11-25 20:21:53,288 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:21:53,289 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 35 [2021-11-25 20:21:53,417 INFO L354 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2021-11-25 20:21:53,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2021-11-25 20:21:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:21:53,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,534 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 20:21:53,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2021-11-25 20:21:53,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,578 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 20:21:53,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2021-11-25 20:21:53,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:21:53,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,622 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-25 20:21:53,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 55 [2021-11-25 20:21:53,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:21:53,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-25 20:21:53,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-25 20:21:53,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:53,781 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 29 [2021-11-25 20:21:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:21:54,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:21:54,212 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 72 treesize of output 64 [2021-11-25 20:21:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-25 20:21:57,058 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-11-25 20:21:57,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 156 treesize of output 101 [2021-11-25 20:21:57,520 INFO L354 Elim1Store]: treesize reduction 282, result has 44.3 percent of original size [2021-11-25 20:21:57,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 1958 treesize of output 1937 [2021-11-25 20:21:57,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:57,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1937 treesize of output 1845 [2021-11-25 20:21:57,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:21:57,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1845 treesize of output 1805