./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta --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 fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 17:21:06,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:21:06,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:21:06,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:21:06,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:21:06,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:21:06,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:21:06,859 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:21:06,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:21:06,870 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:21:06,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:21:06,874 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:21:06,875 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:21:06,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:21:06,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:21:06,882 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:21:06,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:21:06,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:21:06,888 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:21:06,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:21:06,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:21:06,900 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:21:06,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:21:06,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:21:06,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:21:06,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:21:06,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:21:06,921 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:21:06,921 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:21:06,923 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:21:06,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:21:06,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:21:06,927 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:21:06,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:21:06,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:21:06,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:21:06,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:21:06,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:21:06,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:21:06,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:21:06,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:21:06,936 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-10-17 17:21:06,980 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:21:06,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:21:06,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:21:06,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:21:06,983 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:21:06,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:21:06,984 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:21:06,984 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:21:06,984 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:21:06,985 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:21:06,986 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:21:06,986 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:21:06,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:21:06,987 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:21:06,987 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:21:06,987 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:21:06,988 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:21:06,988 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:21:06,989 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 17:21:06,989 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 17:21:06,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:21:06,991 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:21:06,991 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 17:21:06,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:21:06,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:21:06,992 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:21:06,992 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 17:21:06,993 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 17:21:06,993 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 17:21:06,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:21:06,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 17:21:06,994 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:21:06,994 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:21:06,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:21:06,995 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:21:06,995 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:06,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:21:06,996 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:21:06,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:21:06,996 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:21:06,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:21:06,997 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:21:06,997 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fabf091179f48b7141dc193b5040f4974c042bd8a2afb03b99137d693bf63ce7 [2022-10-17 17:21:07,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:21:07,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:21:07,319 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:21:07,320 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:21:07,321 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:21:07,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-10-17 17:21:07,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/data/289bac223/26fcd10f7cf84e549b51772115cd962c/FLAGca1cb8eae [2022-10-17 17:21:07,952 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:21:07,952 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i [2022-10-17 17:21:07,967 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/data/289bac223/26fcd10f7cf84e549b51772115cd962c/FLAGca1cb8eae [2022-10-17 17:21:08,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/data/289bac223/26fcd10f7cf84e549b51772115cd962c [2022-10-17 17:21:08,241 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:21:08,243 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:21:08,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:08,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:21:08,249 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:21:08,250 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:08,251 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f048229 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08, skipping insertion in model container [2022-10-17 17:21:08,251 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:08,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:21:08,342 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:21:08,816 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_1205c0bf-4caf-4458-a9f6-d5b65c816e77/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2022-10-17 17:21:08,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:08,838 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:21:08,908 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_1205c0bf-4caf-4458-a9f6-d5b65c816e77/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-1.i[24987,25000] [2022-10-17 17:21:08,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:21:08,939 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:21:08,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08 WrapperNode [2022-10-17 17:21:08,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:21:08,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:08,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:21:08,942 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:21:08,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:08,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,021 INFO L138 Inliner]: procedures = 129, calls = 39, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 185 [2022-10-17 17:21:09,022 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:21:09,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:21:09,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:21:09,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:21:09,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,054 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,057 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:21:09,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:21:09,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:21:09,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:21:09,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (1/1) ... [2022-10-17 17:21:09,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:21:09,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:09,100 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:21:09,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:21:09,164 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-10-17 17:21:09,164 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 17:21:09,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:21:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-10-17 17:21:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:21:09,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:21:09,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:21:09,325 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:21:09,327 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:21:09,379 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-10-17 17:21:09,811 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:21:09,943 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:21:09,944 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-10-17 17:21:09,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:09 BoogieIcfgContainer [2022-10-17 17:21:09,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:21:09,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:21:09,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:21:09,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:21:09,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:21:08" (1/3) ... [2022-10-17 17:21:09,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfb71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:09, skipping insertion in model container [2022-10-17 17:21:09,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:21:08" (2/3) ... [2022-10-17 17:21:09,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dfb71b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:21:09, skipping insertion in model container [2022-10-17 17:21:09,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:21:09" (3/3) ... [2022-10-17 17:21:09,957 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-1.i [2022-10-17 17:21:09,980 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:21:09,980 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-10-17 17:21:10,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:21:10,045 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3d97af74, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:21:10,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-10-17 17:21:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 92 states have internal predecessors, (109), 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) [2022-10-17 17:21:10,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:21:10,057 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:10,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:21:10,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:10,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:10,064 INFO L85 PathProgramCache]: Analyzing trace with hash 295585, now seen corresponding path program 1 times [2022-10-17 17:21:10,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078613477] [2022-10-17 17:21:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:10,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:10,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:10,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:10,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078613477] [2022-10-17 17:21:10,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078613477] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:10,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:10,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:21:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466174356] [2022-10-17 17:21:10,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:10,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:10,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:10,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:10,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:10,446 INFO L87 Difference]: Start difference. First operand has 94 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 92 states have internal predecessors, (109), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:10,662 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-10-17 17:21:10,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:10,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-10-17 17:21:10,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:10,677 INFO L225 Difference]: With dead ends: 115 [2022-10-17 17:21:10,677 INFO L226 Difference]: Without dead ends: 110 [2022-10-17 17:21:10,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:10,683 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:10,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 70 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:21:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-17 17:21:10,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2022-10-17 17:21:10,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 47 states have (on average 2.106382978723404) internal successors, (99), 86 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) [2022-10-17 17:21:10,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2022-10-17 17:21:10,723 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 3 [2022-10-17 17:21:10,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:10,724 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2022-10-17 17:21:10,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:10,724 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2022-10-17 17:21:10,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-10-17 17:21:10,725 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:10,725 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-10-17 17:21:10,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:21:10,726 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:10,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:10,726 INFO L85 PathProgramCache]: Analyzing trace with hash 295586, now seen corresponding path program 1 times [2022-10-17 17:21:10,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:10,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889300013] [2022-10-17 17:21:10,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:10,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:10,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:10,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889300013] [2022-10-17 17:21:10,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889300013] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:10,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:10,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:10,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116882985] [2022-10-17 17:21:10,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:10,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:10,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:10,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:10,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:10,793 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:10,875 INFO L93 Difference]: Finished difference Result 125 states and 141 transitions. [2022-10-17 17:21:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2022-10-17 17:21:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:10,877 INFO L225 Difference]: With dead ends: 125 [2022-10-17 17:21:10,877 INFO L226 Difference]: Without dead ends: 125 [2022-10-17 17:21:10,878 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:10,879 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 41 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:10,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:10,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-10-17 17:21:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 88. [2022-10-17 17:21:10,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 48 states have (on average 2.0833333333333335) internal successors, (100), 87 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) [2022-10-17 17:21:10,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2022-10-17 17:21:10,891 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 3 [2022-10-17 17:21:10,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:10,891 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2022-10-17 17:21:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2022-10-17 17:21:10,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-10-17 17:21:10,892 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:10,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:21:10,893 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1113659344, now seen corresponding path program 1 times [2022-10-17 17:21:10,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:10,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228643143] [2022-10-17 17:21:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:11,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:11,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228643143] [2022-10-17 17:21:11,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228643143] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:21:11,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914696343] [2022-10-17 17:21:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:11,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:11,023 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:11,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:21:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:11,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 17:21:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:11,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:11,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:11,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914696343] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:11,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [427402675] [2022-10-17 17:21:11,364 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-10-17 17:21:11,365 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:11,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:11,376 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:11,376 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:11,456 INFO L390 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 [2022-10-17 17:21:11,997 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:12,363 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '561#(and (<= 3 |ULTIMATE.start_main_~min~0#1|) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_main_~max~0#1| 5) (< (select |#length| |ULTIMATE.start_main_~#head~1#1.base|) (+ |ULTIMATE.start_main_~#head~1#1.offset| 4)) (<= |ULTIMATE.start_main_~#head~1#1.offset| 0) (not (<= |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~max~0#1|)) (<= 5 |ULTIMATE.start_main_~max~0#1|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (<= 0 |ULTIMATE.start_main_~#head~1#1.offset|) (<= |ULTIMATE.start_main_~min~0#1| 3) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2022-10-17 17:21:12,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:12,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:21:12,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:21:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976679486] [2022-10-17 17:21:12,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:21:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:21:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:21:12,367 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-10-17 17:21:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:12,622 INFO L93 Difference]: Finished difference Result 197 states and 218 transitions. [2022-10-17 17:21:12,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:21:12,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 7 [2022-10-17 17:21:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:12,627 INFO L225 Difference]: With dead ends: 197 [2022-10-17 17:21:12,629 INFO L226 Difference]: Without dead ends: 197 [2022-10-17 17:21:12,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2022-10-17 17:21:12,632 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 171 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:12,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 410 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:21:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-10-17 17:21:12,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 131. [2022-10-17 17:21:12,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 91 states have (on average 2.065934065934066) internal successors, (188), 130 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 188 transitions. [2022-10-17 17:21:12,661 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 188 transitions. Word has length 7 [2022-10-17 17:21:12,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 188 transitions. [2022-10-17 17:21:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2022-10-17 17:21:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 188 transitions. [2022-10-17 17:21:12,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:21:12,663 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:12,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:12,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:12,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:12,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:12,891 INFO L85 PathProgramCache]: Analyzing trace with hash -164566719, now seen corresponding path program 1 times [2022-10-17 17:21:12,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869496598] [2022-10-17 17:21:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:13,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:13,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:13,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869496598] [2022-10-17 17:21:13,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869496598] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:13,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:13,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:13,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207789524] [2022-10-17 17:21:13,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:13,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:13,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:13,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:13,041 INFO L87 Difference]: Start difference. First operand 131 states and 188 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2022-10-17 17:21:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:13,180 INFO L93 Difference]: Finished difference Result 190 states and 256 transitions. [2022-10-17 17:21:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:13,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 [2022-10-17 17:21:13,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:13,183 INFO L225 Difference]: With dead ends: 190 [2022-10-17 17:21:13,183 INFO L226 Difference]: Without dead ends: 190 [2022-10-17 17:21:13,183 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:13,185 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 87 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:13,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 127 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-10-17 17:21:13,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2022-10-17 17:21:13,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 91 states have (on average 2.0) internal successors, (182), 128 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 182 transitions. [2022-10-17 17:21:13,198 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 182 transitions. Word has length 8 [2022-10-17 17:21:13,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:13,199 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 182 transitions. [2022-10-17 17:21:13,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) [2022-10-17 17:21:13,199 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 182 transitions. [2022-10-17 17:21:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:21:13,200 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:13,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:13,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:21:13,201 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:13,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash -164566718, now seen corresponding path program 1 times [2022-10-17 17:21:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:13,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719884683] [2022-10-17 17:21:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:13,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:13,391 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:13,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719884683] [2022-10-17 17:21:13,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719884683] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:13,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:21:13,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593237224] [2022-10-17 17:21:13,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:21:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:13,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:21:13,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:13,396 INFO L87 Difference]: Start difference. First operand 129 states and 182 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-10-17 17:21:13,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:13,653 INFO L93 Difference]: Finished difference Result 301 states and 386 transitions. [2022-10-17 17:21:13,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:21:13,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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 [2022-10-17 17:21:13,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:13,656 INFO L225 Difference]: With dead ends: 301 [2022-10-17 17:21:13,656 INFO L226 Difference]: Without dead ends: 301 [2022-10-17 17:21:13,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:21:13,657 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 195 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:13,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 491 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:21:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-10-17 17:21:13,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 132. [2022-10-17 17:21:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 131 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 185 transitions. [2022-10-17 17:21:13,669 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 185 transitions. Word has length 8 [2022-10-17 17:21:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:13,669 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 185 transitions. [2022-10-17 17:21:13,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 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) [2022-10-17 17:21:13,670 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 185 transitions. [2022-10-17 17:21:13,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:21:13,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:13,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:13,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:21:13,671 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:13,671 INFO L85 PathProgramCache]: Analyzing trace with hash -806836785, now seen corresponding path program 1 times [2022-10-17 17:21:13,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:13,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096568627] [2022-10-17 17:21:13,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:13,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:13,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:13,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096568627] [2022-10-17 17:21:13,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096568627] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:13,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:13,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834242570] [2022-10-17 17:21:13,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:13,727 INFO L87 Difference]: Start difference. First operand 132 states and 185 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:13,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:13,859 INFO L93 Difference]: Finished difference Result 198 states and 262 transitions. [2022-10-17 17:21:13,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:13,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:21:13,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:13,862 INFO L225 Difference]: With dead ends: 198 [2022-10-17 17:21:13,862 INFO L226 Difference]: Without dead ends: 198 [2022-10-17 17:21:13,862 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:13,864 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 87 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:13,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:13,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-10-17 17:21:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 131. [2022-10-17 17:21:13,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 94 states have (on average 1.9361702127659575) internal successors, (182), 130 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:13,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 182 transitions. [2022-10-17 17:21:13,873 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 182 transitions. Word has length 9 [2022-10-17 17:21:13,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:13,874 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 182 transitions. [2022-10-17 17:21:13,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:13,874 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 182 transitions. [2022-10-17 17:21:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:21:13,875 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:13,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:13,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:21:13,876 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:13,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -806836784, now seen corresponding path program 1 times [2022-10-17 17:21:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:13,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28542480] [2022-10-17 17:21:13,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:13,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:13,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:13,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28542480] [2022-10-17 17:21:13,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28542480] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:13,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:13,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:13,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613334925] [2022-10-17 17:21:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:13,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:13,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:13,970 INFO L87 Difference]: Start difference. First operand 131 states and 182 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:14,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:14,083 INFO L93 Difference]: Finished difference Result 199 states and 260 transitions. [2022-10-17 17:21:14,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:14,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:21:14,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:14,085 INFO L225 Difference]: With dead ends: 199 [2022-10-17 17:21:14,085 INFO L226 Difference]: Without dead ends: 199 [2022-10-17 17:21:14,086 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:14,087 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 90 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:14,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 136 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-10-17 17:21:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2022-10-17 17:21:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 94 states have (on average 1.9042553191489362) internal successors, (179), 129 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2022-10-17 17:21:14,093 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 9 [2022-10-17 17:21:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:14,094 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2022-10-17 17:21:14,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:14,094 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2022-10-17 17:21:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 17:21:14,095 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:14,095 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:14,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:21:14,096 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:14,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:14,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2019147847, now seen corresponding path program 1 times [2022-10-17 17:21:14,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:14,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400433497] [2022-10-17 17:21:14,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:14,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:14,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:14,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400433497] [2022-10-17 17:21:14,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400433497] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:21:14,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376377619] [2022-10-17 17:21:14,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:14,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:14,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:14,196 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:14,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:21:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:14,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 17:21:14,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:14,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:21:14,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376377619] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:14,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [649356271] [2022-10-17 17:21:14,409 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-10-17 17:21:14,410 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:14,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:14,410 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:14,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:14,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,441 INFO L390 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 [2022-10-17 17:21:14,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,557 INFO L390 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 [2022-10-17 17:21:14,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,671 INFO L390 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 [2022-10-17 17:21:14,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,757 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,795 INFO L390 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 30 treesize of output 21 [2022-10-17 17:21:14,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:14,825 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:15,167 INFO L356 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2022-10-17 17:21:15,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 397 treesize of output 405 [2022-10-17 17:21:15,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:15,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:15,864 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-17 17:21:15,865 INFO L390 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 424 treesize of output 422 [2022-10-17 17:21:15,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:15,940 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-10-17 17:21:15,940 INFO L390 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 444 treesize of output 442 [2022-10-17 17:21:15,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:15,992 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-10-17 17:21:15,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 488 treesize of output 471 [2022-10-17 17:21:16,183 INFO L390 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 [2022-10-17 17:21:16,197 INFO L390 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 [2022-10-17 17:21:16,240 INFO L390 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 [2022-10-17 17:21:16,253 INFO L390 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 [2022-10-17 17:21:16,268 INFO L390 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 [2022-10-17 17:21:16,346 INFO L390 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 [2022-10-17 17:21:16,357 INFO L390 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 [2022-10-17 17:21:16,380 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:17,889 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2391#(and (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_node_create_with_sublist_#t~ret6#1.offset|) (<= 3 |ULTIMATE.start_sll_append_~sublist_length#1|) (< (select |#length| |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base|) (+ |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.offset| 8)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 3 |ULTIMATE.start_node_create_with_sublist_~sublist_length#1|) (<= |ULTIMATE.start_main_~i~0#1| 3) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= |ULTIMATE.start_node_create_with_sublist_#in~sublist_length#1| 3) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_node_create_with_sublist_#t~ret6#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_append_~sublist_length#1| 3) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (<= 3 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (<= 3 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 3) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (= |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.offset| 0) (= 3 |ULTIMATE.start_main_~min~0#1|) (<= |ULTIMATE.start_sll_append_#in~sublist_length#1| 3) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_node_create_with_sublist_#in~sublist_length#1|) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 3 |ULTIMATE.start_sll_append_#in~sublist_length#1|) (<= |ULTIMATE.start_node_create_with_sublist_~sublist_length#1| 3) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:17,889 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:17,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:21:17,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-10-17 17:21:17,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791801038] [2022-10-17 17:21:17,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:17,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-10-17 17:21:17,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-10-17 17:21:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-10-17 17:21:17,892 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-10-17 17:21:18,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:18,235 INFO L93 Difference]: Finished difference Result 309 states and 386 transitions. [2022-10-17 17:21:18,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 17:21:18,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 11 [2022-10-17 17:21:18,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:18,238 INFO L225 Difference]: With dead ends: 309 [2022-10-17 17:21:18,238 INFO L226 Difference]: Without dead ends: 309 [2022-10-17 17:21:18,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2022-10-17 17:21:18,240 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 193 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:18,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 800 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 17:21:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-10-17 17:21:18,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 148. [2022-10-17 17:21:18,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 112 states have (on average 1.7589285714285714) internal successors, (197), 147 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 197 transitions. [2022-10-17 17:21:18,246 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 197 transitions. Word has length 11 [2022-10-17 17:21:18,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:18,247 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 197 transitions. [2022-10-17 17:21:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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) [2022-10-17 17:21:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 197 transitions. [2022-10-17 17:21:18,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-10-17 17:21:18,248 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:18,248 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1] [2022-10-17 17:21:18,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:18,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:18,462 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:18,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:18,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1990905420, now seen corresponding path program 2 times [2022-10-17 17:21:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:18,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987803716] [2022-10-17 17:21:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:21:18,556 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:18,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987803716] [2022-10-17 17:21:18,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987803716] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:18,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:18,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-10-17 17:21:18,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815908139] [2022-10-17 17:21:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:18,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:21:18,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:18,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:21:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:18,564 INFO L87 Difference]: Start difference. First operand 148 states and 197 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:18,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:18,654 INFO L93 Difference]: Finished difference Result 207 states and 269 transitions. [2022-10-17 17:21:18,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:21:18,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-10-17 17:21:18,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:18,656 INFO L225 Difference]: With dead ends: 207 [2022-10-17 17:21:18,656 INFO L226 Difference]: Without dead ends: 207 [2022-10-17 17:21:18,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:21:18,659 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:18,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 115 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:18,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-10-17 17:21:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 176. [2022-10-17 17:21:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 140 states have (on average 1.7357142857142858) internal successors, (243), 175 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 243 transitions. [2022-10-17 17:21:18,668 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 243 transitions. Word has length 15 [2022-10-17 17:21:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:18,669 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 243 transitions. [2022-10-17 17:21:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 243 transitions. [2022-10-17 17:21:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 17:21:18,670 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:18,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:18,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-10-17 17:21:18,671 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:18,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:18,671 INFO L85 PathProgramCache]: Analyzing trace with hash -279277977, now seen corresponding path program 2 times [2022-10-17 17:21:18,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:18,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101594524] [2022-10-17 17:21:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:18,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:21:19,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101594524] [2022-10-17 17:21:19,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101594524] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:21:19,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227877905] [2022-10-17 17:21:19,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:21:19,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:19,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:19,066 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:19,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:21:19,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-10-17 17:21:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:21:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-10-17 17:21:19,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:19,187 INFO L390 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 [2022-10-17 17:21:19,191 INFO L390 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 [2022-10-17 17:21:19,230 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 17:21:19,231 INFO L390 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 [2022-10-17 17:21:19,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:19,279 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 17:21:19,279 INFO L390 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 [2022-10-17 17:21:19,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:19,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:19,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2022-10-17 17:21:19,386 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-10-17 17:21:19,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-10-17 17:21:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:21:19,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:21:26,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227877905] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1368583269] [2022-10-17 17:21:26,188 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-10-17 17:21:26,188 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:26,188 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:26,189 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:26,189 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,211 INFO L390 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 [2022-10-17 17:21:26,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,287 INFO L390 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 [2022-10-17 17:21:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,378 INFO L390 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 [2022-10-17 17:21:26,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,439 INFO L390 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 30 treesize of output 21 [2022-10-17 17:21:26,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,460 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:26,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:26,487 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:26,764 INFO L356 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2022-10-17 17:21:26,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 397 treesize of output 405 [2022-10-17 17:21:27,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:27,223 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-17 17:21:27,223 INFO L390 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 421 treesize of output 419 [2022-10-17 17:21:27,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:27,283 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-10-17 17:21:27,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 433 treesize of output 416 [2022-10-17 17:21:27,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:27,345 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-17 17:21:27,346 INFO L390 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 429 treesize of output 427 [2022-10-17 17:21:27,502 INFO L390 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 [2022-10-17 17:21:27,511 INFO L390 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 [2022-10-17 17:21:27,547 INFO L390 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 [2022-10-17 17:21:27,562 INFO L390 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 [2022-10-17 17:21:27,574 INFO L390 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 [2022-10-17 17:21:27,644 INFO L390 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 [2022-10-17 17:21:27,654 INFO L390 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 [2022-10-17 17:21:27,667 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:21:29,181 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3358#(and (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_node_create_with_sublist_#t~ret6#1.offset|) (<= 3 |ULTIMATE.start_sll_append_~sublist_length#1|) (< (select |#length| |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base|) (+ |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.offset| 8)) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 3 |ULTIMATE.start_node_create_with_sublist_~sublist_length#1|) (<= |ULTIMATE.start_main_~i~0#1| 3) (<= 0 |ULTIMATE.start_sll_append_~head#1.offset|) (<= |ULTIMATE.start_node_create_with_sublist_#in~sublist_length#1| 3) (<= 0 |ULTIMATE.start_sll_append_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.offset|) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_node_create_with_sublist_#t~ret6#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_append_~sublist_length#1| 3) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (<= 3 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (<= 3 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_append_#in~head#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 3) (<= |ULTIMATE.start_sll_append_#in~head#1.offset| 0) (= |ULTIMATE.start_node_create_with_sublist_~new_node~0#1.offset| 0) (= 3 |ULTIMATE.start_main_~min~0#1|) (<= |ULTIMATE.start_sll_append_#in~sublist_length#1| 3) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_node_create_with_sublist_#in~sublist_length#1|) (<= |ULTIMATE.start_sll_append_~head#1.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 3 |ULTIMATE.start_sll_append_#in~sublist_length#1|) (<= |ULTIMATE.start_node_create_with_sublist_~sublist_length#1| 3) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-10-17 17:21:29,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:21:29,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:21:29,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-10-17 17:21:29,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335101565] [2022-10-17 17:21:29,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:21:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:21:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:29,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:21:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-10-17 17:21:29,183 INFO L87 Difference]: Start difference. First operand 176 states and 243 transitions. Second operand has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:29,559 INFO L93 Difference]: Finished difference Result 230 states and 289 transitions. [2022-10-17 17:21:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 17:21:29,560 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-10-17 17:21:29,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:29,562 INFO L225 Difference]: With dead ends: 230 [2022-10-17 17:21:29,562 INFO L226 Difference]: Without dead ends: 230 [2022-10-17 17:21:29,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-10-17 17:21:29,563 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 113 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:29,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 417 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 336 Invalid, 0 Unknown, 212 Unchecked, 0.3s Time] [2022-10-17 17:21:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-10-17 17:21:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 174. [2022-10-17 17:21:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 140 states have (on average 1.6928571428571428) internal successors, (237), 173 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 237 transitions. [2022-10-17 17:21:29,570 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 237 transitions. Word has length 17 [2022-10-17 17:21:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:29,570 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 237 transitions. [2022-10-17 17:21:29,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 237 transitions. [2022-10-17 17:21:29,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-10-17 17:21:29,572 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:29,572 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:29,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:21:29,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 17:21:29,786 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1864429725, now seen corresponding path program 1 times [2022-10-17 17:21:29,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:29,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308734016] [2022-10-17 17:21:29,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:29,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:29,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:21:29,864 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:29,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308734016] [2022-10-17 17:21:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308734016] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:29,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:29,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:29,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235191960] [2022-10-17 17:21:29,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:29,870 INFO L87 Difference]: Start difference. First operand 174 states and 237 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-10-17 17:21:29,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:29,970 INFO L93 Difference]: Finished difference Result 201 states and 252 transitions. [2022-10-17 17:21:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:21:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 18 [2022-10-17 17:21:29,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:29,973 INFO L225 Difference]: With dead ends: 201 [2022-10-17 17:21:29,973 INFO L226 Difference]: Without dead ends: 201 [2022-10-17 17:21:29,973 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:29,974 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 87 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:29,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 173 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-10-17 17:21:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 163. [2022-10-17 17:21:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 162 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:29,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 212 transitions. [2022-10-17 17:21:29,982 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 212 transitions. Word has length 18 [2022-10-17 17:21:29,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:29,983 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 212 transitions. [2022-10-17 17:21:29,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2022-10-17 17:21:29,983 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 212 transitions. [2022-10-17 17:21:29,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:21:29,987 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:29,988 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:29,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 17:21:29,989 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1967460204, now seen corresponding path program 1 times [2022-10-17 17:21:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:29,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837190675] [2022-10-17 17:21:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:30,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:21:30,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837190675] [2022-10-17 17:21:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837190675] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:30,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:30,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840364279] [2022-10-17 17:21:30,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:30,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:30,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:30,082 INFO L87 Difference]: Start difference. First operand 163 states and 212 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:30,182 INFO L93 Difference]: Finished difference Result 179 states and 228 transitions. [2022-10-17 17:21:30,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 17:21:30,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-10-17 17:21:30,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:30,184 INFO L225 Difference]: With dead ends: 179 [2022-10-17 17:21:30,184 INFO L226 Difference]: Without dead ends: 179 [2022-10-17 17:21:30,185 INFO L412 NwaCegarLoop]: 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 [2022-10-17 17:21:30,185 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 7 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:30,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:30,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-10-17 17:21:30,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 164. [2022-10-17 17:21:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 130 states have (on average 1.6384615384615384) internal successors, (213), 163 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 213 transitions. [2022-10-17 17:21:30,191 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 213 transitions. Word has length 19 [2022-10-17 17:21:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:30,192 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 213 transitions. [2022-10-17 17:21:30,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 213 transitions. [2022-10-17 17:21:30,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:21:30,193 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:30,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:30,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 17:21:30,193 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462510, now seen corresponding path program 1 times [2022-10-17 17:21:30,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:30,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897135568] [2022-10-17 17:21:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:30,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:30,318 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-10-17 17:21:30,319 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:30,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897135568] [2022-10-17 17:21:30,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897135568] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:30,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:30,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:21:30,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438825998] [2022-10-17 17:21:30,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:30,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:30,321 INFO L87 Difference]: Start difference. First operand 164 states and 213 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-10-17 17:21:30,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:30,422 INFO L93 Difference]: Finished difference Result 165 states and 213 transitions. [2022-10-17 17:21:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:21:30,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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 19 [2022-10-17 17:21:30,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:30,424 INFO L225 Difference]: With dead ends: 165 [2022-10-17 17:21:30,424 INFO L226 Difference]: Without dead ends: 160 [2022-10-17 17:21:30,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:30,425 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:30,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 161 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-10-17 17:21:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2022-10-17 17:21:30,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 124 states have (on average 1.6612903225806452) internal successors, (206), 157 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2022-10-17 17:21:30,429 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 19 [2022-10-17 17:21:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:30,429 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2022-10-17 17:21:30,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) 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) [2022-10-17 17:21:30,429 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2022-10-17 17:21:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:21:30,430 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:30,430 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 17:21:30,431 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2097964542, now seen corresponding path program 1 times [2022-10-17 17:21:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488275218] [2022-10-17 17:21:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:30,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:21:30,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:30,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488275218] [2022-10-17 17:21:30,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488275218] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:30,520 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:30,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:21:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732987774] [2022-10-17 17:21:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:30,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 17:21:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:30,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 17:21:30,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 17:21:30,522 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-17 17:21:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:30,625 INFO L93 Difference]: Finished difference Result 180 states and 228 transitions. [2022-10-17 17:21:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:21:30,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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 [2022-10-17 17:21:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:30,627 INFO L225 Difference]: With dead ends: 180 [2022-10-17 17:21:30,627 INFO L226 Difference]: Without dead ends: 180 [2022-10-17 17:21:30,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:30,628 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 162 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:30,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 84 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:30,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-10-17 17:21:30,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 157. [2022-10-17 17:21:30,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 124 states have (on average 1.6370967741935485) internal successors, (203), 156 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 203 transitions. [2022-10-17 17:21:30,633 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 203 transitions. Word has length 19 [2022-10-17 17:21:30,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:30,633 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 203 transitions. [2022-10-17 17:21:30,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 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) [2022-10-17 17:21:30,633 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 203 transitions. [2022-10-17 17:21:30,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-10-17 17:21:30,634 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:30,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:30,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 17:21:30,635 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:30,635 INFO L85 PathProgramCache]: Analyzing trace with hash -2097964541, now seen corresponding path program 1 times [2022-10-17 17:21:30,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:30,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455901846] [2022-10-17 17:21:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:30,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:21:30,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:30,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455901846] [2022-10-17 17:21:30,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455901846] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:21:30,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:21:30,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 17:21:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458544052] [2022-10-17 17:21:30,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:21:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 17:21:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:21:30,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 17:21:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:21:30,797 INFO L87 Difference]: Start difference. First operand 157 states and 203 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-10-17 17:21:30,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:21:30,893 INFO L93 Difference]: Finished difference Result 156 states and 200 transitions. [2022-10-17 17:21:30,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 17:21:30,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 [2022-10-17 17:21:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:21:30,895 INFO L225 Difference]: With dead ends: 156 [2022-10-17 17:21:30,895 INFO L226 Difference]: Without dead ends: 156 [2022-10-17 17:21:30,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:21:30,896 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 169 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:21:30,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 63 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:21:30,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-10-17 17:21:30,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-10-17 17:21:30,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 124 states have (on average 1.6129032258064515) internal successors, (200), 155 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:21:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 200 transitions. [2022-10-17 17:21:30,901 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 200 transitions. Word has length 19 [2022-10-17 17:21:30,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:21:30,902 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 200 transitions. [2022-10-17 17:21:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-10-17 17:21:30,902 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 200 transitions. [2022-10-17 17:21:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-10-17 17:21:30,903 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:21:30,903 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:21:30,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 17:21:30,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-10-17 17:21:30,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:21:30,904 INFO L85 PathProgramCache]: Analyzing trace with hash -612391313, now seen corresponding path program 1 times [2022-10-17 17:21:30,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:21:30,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573329680] [2022-10-17 17:21:30,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:30,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:21:30,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:31,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:21:31,367 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:21:31,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573329680] [2022-10-17 17:21:31,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573329680] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:21:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295290452] [2022-10-17 17:21:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:21:31,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:21:31,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:21:31,369 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:21:31,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1205c0bf-4caf-4458-a9f6-d5b65c816e77/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:21:31,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:21:31,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 22 conjunts are in the unsatisfiable core [2022-10-17 17:21:31,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:21:31,505 INFO L390 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 [2022-10-17 17:21:31,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:31,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:31,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:31,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:31,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-10-17 17:21:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 17:21:31,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:21:33,871 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_sll_append_~head#1.offset|) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_300 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_301 Int)) (<= (+ |c_ULTIMATE.start_sll_append_~head#1.offset| 4) (select (store (store |c_#length| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_300) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_301) |c_ULTIMATE.start_sll_append_~head#1.base|)))))))) is different from false [2022-10-17 17:21:35,990 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_sll_append_~head#1.offset|) (forall ((|v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| Int)) (or (forall ((v_ArrVal_299 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_300 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int)) (or (forall ((v_ArrVal_301 Int)) (<= (+ |c_ULTIMATE.start_sll_append_~head#1.offset| 4) (select (store (store (store |c_#length| |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| v_ArrVal_299) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_300) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_301) |c_ULTIMATE.start_sll_append_~head#1.base|))) (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| |c_#StackHeapBarrier|)))))) (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| |c_#StackHeapBarrier|))))) is different from false [2022-10-17 17:21:38,166 WARN L833 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_main_~#head~1#1.offset|) (forall ((|v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| Int)) (or (forall ((v_ArrVal_298 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_299 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_300 Int) (|v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| Int)) (or (not (< |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_301 Int)) (<= (+ 4 |c_ULTIMATE.start_main_~#head~1#1.offset|) (select (store (store (store (store |c_#length| |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| v_ArrVal_298) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_22| v_ArrVal_299) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_21| v_ArrVal_300) |v_ULTIMATE.start_sll_create_~new_head~0#1.base_20| v_ArrVal_301) |c_ULTIMATE.start_main_~#head~1#1.base|))))))))) (not (< |v_ULTIMATE.start_node_create_with_sublist_~new_node~0#1.base_20| |c_#StackHeapBarrier|))))) is different from false [2022-10-17 17:21:38,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2022-10-17 17:21:38,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295290452] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:21:38,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1451838973] [2022-10-17 17:21:38,280 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-10-17 17:21:38,280 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:21:38,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:21:38,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:21:38,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:21:38,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,300 INFO L390 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 [2022-10-17 17:21:38,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,386 INFO L390 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 [2022-10-17 17:21:38,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,464 INFO L390 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 [2022-10-17 17:21:38,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,531 INFO L390 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 30 treesize of output 21 [2022-10-17 17:21:38,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,553 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:38,577 INFO L390 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 19 treesize of output 18 [2022-10-17 17:21:38,875 INFO L356 Elim1Store]: treesize reduction 138, result has 17.9 percent of original size [2022-10-17 17:21:38,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 397 treesize of output 405 [2022-10-17 17:21:39,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,347 INFO L356 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-10-17 17:21:39,347 INFO L390 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 417 treesize of output 415 [2022-10-17 17:21:39,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,422 INFO L356 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2022-10-17 17:21:39,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 457 treesize of output 440 [2022-10-17 17:21:39,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:21:39,479 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-10-17 17:21:39,480 INFO L390 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 453 treesize of output 451 [2022-10-17 17:21:39,632 INFO L390 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 [2022-10-17 17:21:39,644 INFO L390 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 [2022-10-17 17:21:39,679 INFO L390 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 [2022-10-17 17:21:39,690 INFO L390 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 [2022-10-17 17:21:39,701 INFO L390 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 [2022-10-17 17:21:39,740 INFO L390 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 [2022-10-17 17:21:39,748 INFO L390 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 [2022-10-17 17:21:39,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-10-17 17:21:39,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 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 [2022-10-17 17:21:39,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select 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 [2022-10-17 17:21:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:21:39,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,913 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 17:21:39,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-10-17 17:21:39,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:39,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-10-17 17:21:40,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:21:40,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-10-17 17:21:40,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-10-17 17:21:40,065 INFO L180 IcfgInterpreter]: Interpretation finished