./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0 --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 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a --- 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-e04fb08 [2022-11-16 19:57:35,768 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 19:57:35,771 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 19:57:35,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 19:57:35,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 19:57:35,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 19:57:35,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 19:57:35,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 19:57:35,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 19:57:35,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 19:57:35,806 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 19:57:35,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 19:57:35,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 19:57:35,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 19:57:35,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 19:57:35,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 19:57:35,813 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 19:57:35,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 19:57:35,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 19:57:35,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 19:57:35,822 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 19:57:35,824 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 19:57:35,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 19:57:35,827 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 19:57:35,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 19:57:35,832 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 19:57:35,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 19:57:35,834 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 19:57:35,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 19:57:35,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 19:57:35,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 19:57:35,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 19:57:35,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 19:57:35,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 19:57:35,841 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 19:57:35,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 19:57:35,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 19:57:35,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 19:57:35,844 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 19:57:35,845 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 19:57:35,846 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 19:57:35,847 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-16 19:57:35,876 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 19:57:35,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 19:57:35,877 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 19:57:35,878 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 19:57:35,879 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 19:57:35,879 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 19:57:35,880 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 19:57:35,880 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 19:57:35,881 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 19:57:35,881 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 19:57:35,882 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 19:57:35,882 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 19:57:35,882 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 19:57:35,883 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 19:57:35,883 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 19:57:35,884 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 19:57:35,884 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 19:57:35,885 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 19:57:35,886 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 19:57:35,886 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 19:57:35,887 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 19:57:35,887 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 19:57:35,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 19:57:35,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 19:57:35,889 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 19:57:35,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 19:57:35,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 19:57:35,890 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 19:57:35,890 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 19:57:35,891 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 19:57:35,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 19:57:35,892 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 19:57:35,892 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 19:57:35,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 19:57:35,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 19:57:35,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:57:35,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 19:57:35,895 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 19:57:35,895 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 19:57:35,895 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 19:57:35,896 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 19:57:35,896 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 19:57:35,897 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_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fd0aba5d9be2820550e57012fb4e12f76fe291bb253443319d08539e5b2ba1a [2022-11-16 19:57:36,229 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 19:57:36,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 19:57:36,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 19:57:36,276 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 19:57:36,277 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 19:57:36,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/list-simple/sll2n_update_all.i [2022-11-16 19:57:36,369 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/data/be4e9ba46/53261a46213c4b9d98b4154a71cf6559/FLAG42529be29 [2022-11-16 19:57:37,055 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 19:57:37,056 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/sv-benchmarks/c/list-simple/sll2n_update_all.i [2022-11-16 19:57:37,081 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/data/be4e9ba46/53261a46213c4b9d98b4154a71cf6559/FLAG42529be29 [2022-11-16 19:57:37,336 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/data/be4e9ba46/53261a46213c4b9d98b4154a71cf6559 [2022-11-16 19:57:37,339 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 19:57:37,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 19:57:37,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 19:57:37,343 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 19:57:37,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 19:57:37,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b04301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37, skipping insertion in model container [2022-11-16 19:57:37,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 19:57:37,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 19:57:37,772 WARN L229 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_d2b68bfb-2e84-4eac-972e-77f076360969/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2022-11-16 19:57:37,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:57:37,786 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 19:57:37,832 WARN L229 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_d2b68bfb-2e84-4eac-972e-77f076360969/sv-benchmarks/c/list-simple/sll2n_update_all.i[24218,24231] [2022-11-16 19:57:37,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 19:57:37,865 INFO L208 MainTranslator]: Completed translation [2022-11-16 19:57:37,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37 WrapperNode [2022-11-16 19:57:37,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 19:57:37,867 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 19:57:37,867 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 19:57:37,867 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 19:57:37,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,893 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,921 INFO L138 Inliner]: procedures = 126, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 121 [2022-11-16 19:57:37,922 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 19:57:37,923 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 19:57:37,923 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 19:57:37,923 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 19:57:37,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,953 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,955 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,958 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 19:57:37,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 19:57:37,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 19:57:37,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 19:57:37,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (1/1) ... [2022-11-16 19:57:37,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 19:57:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:57:38,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 19:57:38,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 19:57:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 19:57:38,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 19:57:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 19:57:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 19:57:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 19:57:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 19:57:38,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 19:57:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 19:57:38,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 19:57:38,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 19:57:38,184 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 19:57:38,186 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 19:57:38,502 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 19:57:38,570 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 19:57:38,570 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 19:57:38,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:57:38 BoogieIcfgContainer [2022-11-16 19:57:38,574 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 19:57:38,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 19:57:38,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 19:57:38,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 19:57:38,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:57:37" (1/3) ... [2022-11-16 19:57:38,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638bf6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:57:38, skipping insertion in model container [2022-11-16 19:57:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:57:37" (2/3) ... [2022-11-16 19:57:38,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@638bf6e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:57:38, skipping insertion in model container [2022-11-16 19:57:38,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:57:38" (3/3) ... [2022-11-16 19:57:38,585 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_update_all.i [2022-11-16 19:57:38,609 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 19:57:38,610 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-11-16 19:57:38,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 19:57:38,674 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;@1908761d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 19:57:38,674 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-11-16 19:57:38,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:57:38,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:38,689 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:57:38,690 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:38,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:38,697 INFO L85 PathProgramCache]: Analyzing trace with hash 5402296, now seen corresponding path program 1 times [2022-11-16 19:57:38,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:38,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164087153] [2022-11-16 19:57:38,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:38,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:39,034 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164087153] [2022-11-16 19:57:39,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164087153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:39,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:39,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:57:39,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464781533] [2022-11-16 19:57:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:39,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:57:39,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:57:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:57:39,092 INFO L87 Difference]: Start difference. First operand has 45 states, 23 states have (on average 2.260869565217391) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:39,293 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2022-11-16 19:57:39,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:57:39,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 19:57:39,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:39,313 INFO L225 Difference]: With dead ends: 76 [2022-11-16 19:57:39,313 INFO L226 Difference]: Without dead ends: 73 [2022-11-16 19:57:39,316 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 [2022-11-16 19:57:39,321 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 45 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:39,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 19:57:39,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-16 19:57:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 41. [2022-11-16 19:57:39,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 2.090909090909091) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-11-16 19:57:39,405 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 4 [2022-11-16 19:57:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:39,405 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-11-16 19:57:39,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-11-16 19:57:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 19:57:39,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:39,409 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 19:57:39,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 19:57:39,409 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:39,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:39,411 INFO L85 PathProgramCache]: Analyzing trace with hash 5402297, now seen corresponding path program 1 times [2022-11-16 19:57:39,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:39,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286944557] [2022-11-16 19:57:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:39,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:39,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:39,587 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:39,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286944557] [2022-11-16 19:57:39,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286944557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:39,588 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:39,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:57:39,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959182069] [2022-11-16 19:57:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:39,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:57:39,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:39,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:57:39,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:57:39,592 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:39,674 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-11-16 19:57:39,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:57:39,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 19:57:39,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:39,676 INFO L225 Difference]: With dead ends: 71 [2022-11-16 19:57:39,677 INFO L226 Difference]: Without dead ends: 71 [2022-11-16 19:57:39,677 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 [2022-11-16 19:57:39,679 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 41 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:39,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 64 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:39,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-16 19:57:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 39. [2022-11-16 19:57:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 2.0) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-16 19:57:39,685 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 4 [2022-11-16 19:57:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:39,686 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-16 19:57:39,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,686 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-16 19:57:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 19:57:39,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:39,687 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 19:57:39,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 19:57:39,687 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 172148575, now seen corresponding path program 1 times [2022-11-16 19:57:39,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:39,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431596022] [2022-11-16 19:57:39,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:39,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:39,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:39,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431596022] [2022-11-16 19:57:39,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431596022] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:39,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:39,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 19:57:39,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192914034] [2022-11-16 19:57:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:39,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 19:57:39,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 19:57:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 19:57:39,758 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:39,825 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-11-16 19:57:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 19:57:39,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 19:57:39,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:39,827 INFO L225 Difference]: With dead ends: 46 [2022-11-16 19:57:39,827 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 19:57:39,828 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 [2022-11-16 19:57:39,832 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:39,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 56 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:39,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 19:57:39,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2022-11-16 19:57:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-16 19:57:39,848 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 5 [2022-11-16 19:57:39,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:39,848 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-16 19:57:39,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:39,849 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-16 19:57:39,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:57:39,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:39,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:57:39,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 19:57:39,850 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:39,851 INFO L85 PathProgramCache]: Analyzing trace with hash 896643063, now seen corresponding path program 1 times [2022-11-16 19:57:39,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:39,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002134401] [2022-11-16 19:57:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:39,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:39,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:39,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:39,963 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:39,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002134401] [2022-11-16 19:57:39,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002134401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:39,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:39,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:57:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822012558] [2022-11-16 19:57:39,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:39,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:57:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:39,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:57:39,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:57:39,966 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:40,069 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-11-16 19:57:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:57:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:57:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:40,071 INFO L225 Difference]: With dead ends: 54 [2022-11-16 19:57:40,071 INFO L226 Difference]: Without dead ends: 54 [2022-11-16 19:57:40,072 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 [2022-11-16 19:57:40,073 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:40,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-16 19:57:40,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2022-11-16 19:57:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-16 19:57:40,080 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 6 [2022-11-16 19:57:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:40,080 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-16 19:57:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-16 19:57:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 19:57:40,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:40,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 19:57:40,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 19:57:40,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:40,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash 896643064, now seen corresponding path program 1 times [2022-11-16 19:57:40,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:40,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311364762] [2022-11-16 19:57:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:40,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:40,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311364762] [2022-11-16 19:57:40,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311364762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:40,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:40,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 19:57:40,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904572641] [2022-11-16 19:57:40,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:40,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:57:40,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:57:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:57:40,303 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:40,394 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2022-11-16 19:57:40,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:57:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 19:57:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:40,402 INFO L225 Difference]: With dead ends: 41 [2022-11-16 19:57:40,402 INFO L226 Difference]: Without dead ends: 41 [2022-11-16 19:57:40,404 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 [2022-11-16 19:57:40,408 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 77 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:40,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 20 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-16 19:57:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-11-16 19:57:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-16 19:57:40,428 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 6 [2022-11-16 19:57:40,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:40,429 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-16 19:57:40,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:40,430 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-16 19:57:40,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:57:40,430 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:40,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:57:40,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 19:57:40,432 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:40,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:40,437 INFO L85 PathProgramCache]: Analyzing trace with hash -877899620, now seen corresponding path program 1 times [2022-11-16 19:57:40,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:40,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131124220] [2022-11-16 19:57:40,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:40,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:40,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:40,618 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131124220] [2022-11-16 19:57:40,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131124220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:57:40,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424068616] [2022-11-16 19:57:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:40,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:57:40,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:57:40,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:57:40,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 19:57:40,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:40,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:57:40,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:57:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:40,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:40,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424068616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:40,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1716999041] [2022-11-16 19:57:40,920 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:57:40,921 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:57:40,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:57:40,933 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:57:40,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:57:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,065 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:41,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:57:41,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:41,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:41,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:57:41,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:41,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:41,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:41,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:41,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:57:41,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:57:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:41,667 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:57:41,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-16 19:57:41,728 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:41,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:57:41,774 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:41,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:57:42,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:42,324 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:42,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2022-11-16 19:57:42,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:42,399 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:57:42,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 689 treesize of output 658 [2022-11-16 19:57:42,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:42,484 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:42,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2022-11-16 19:57:43,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:43,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:43,317 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:43,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:57:43,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:43,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:43,367 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:57:43,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2022-11-16 19:57:43,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:43,406 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:57:43,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 375 treesize of output 360 [2022-11-16 19:57:43,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,610 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:57:43,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-16 19:57:43,852 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:43,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:57:43,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:43,882 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:57:43,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-16 19:57:43,929 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:43,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:57:44,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:44,147 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:44,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-16 19:57:44,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,223 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:57:44,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2022-11-16 19:57:44,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:44,292 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:44,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2022-11-16 19:57:44,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:44,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:44,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,641 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:57:44,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-16 19:57:44,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,690 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:44,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 19:57:44,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:44,735 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:57:44,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2022-11-16 19:57:44,923 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:44,933 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:44,939 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:57:47,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1716999041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:47,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:57:47,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [3, 3, 3] total 11 [2022-11-16 19:57:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601489850] [2022-11-16 19:57:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:47,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:57:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:57:47,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:57:47,560 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:47,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:47,854 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-16 19:57:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 19:57:47,854 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:57:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:47,855 INFO L225 Difference]: With dead ends: 43 [2022-11-16 19:57:47,855 INFO L226 Difference]: Without dead ends: 43 [2022-11-16 19:57:47,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:57:47,856 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 49 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:47,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 67 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 19:57:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-16 19:57:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2022-11-16 19:57:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.8) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-16 19:57:47,859 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 10 [2022-11-16 19:57:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:47,859 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-16 19:57:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-16 19:57:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-16 19:57:47,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:47,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:57:47,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 19:57:48,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 19:57:48,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:48,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:48,070 INFO L85 PathProgramCache]: Analyzing trace with hash -877896048, now seen corresponding path program 1 times [2022-11-16 19:57:48,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:48,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840497078] [2022-11-16 19:57:48,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:48,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:48,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:48,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840497078] [2022-11-16 19:57:48,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840497078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:57:48,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803679057] [2022-11-16 19:57:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:48,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:57:48,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:57:48,137 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:57:48,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 19:57:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:48,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:57:48,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:57:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:48,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:57:48,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803679057] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:48,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [989145959] [2022-11-16 19:57:48,280 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2022-11-16 19:57:48,281 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:57:48,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:57:48,281 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:57:48,281 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:57:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,319 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:48,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:57:48,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:48,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:48,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:57:48,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:48,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:57:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:48,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:57:48,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:48,670 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:57:48,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:57:48,711 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:48,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:57:48,755 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:48,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:57:49,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:49,050 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:49,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:57:49,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,107 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:57:49,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2022-11-16 19:57:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:49,168 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:49,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:57:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:49,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:49,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:49,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,780 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:57:49,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-16 19:57:49,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,817 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:49,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:57:49,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:49,853 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:49,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2022-11-16 19:57:49,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:50,013 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:57:50,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-16 19:57:50,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:50,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:50,230 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:57:50,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:57:50,267 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:50,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:57:50,306 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:50,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:57:50,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:50,653 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:50,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:57:50,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:50,713 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:57:50,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2022-11-16 19:57:50,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:50,802 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:50,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:57:51,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:51,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:51,233 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:51,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:57:51,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:51,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:51,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:51,272 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:57:51,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-16 19:57:51,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:51,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:51,309 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:57:51,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2022-11-16 19:57:51,456 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:51,465 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:51,468 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:57:53,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '763#(and (= |ULTIMATE.start_main_~s~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_main_~new_data~0#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (= |ULTIMATE.start_sll_update_at_~head#1.base| |ULTIMATE.start_sll_update_at_#in~head#1.base|) (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (= |ULTIMATE.start_sll_update_at_~index#1| |ULTIMATE.start_sll_update_at_#in~index#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_update_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_update_at_#in~head#1.offset| |ULTIMATE.start_sll_update_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (= |ULTIMATE.start_sll_update_at_~data#1| |ULTIMATE.start_sll_update_at_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (= |ULTIMATE.start_sll_update_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:57:53,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:57:53,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:57:53,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-16 19:57:53,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805205381] [2022-11-16 19:57:53,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:57:53,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:57:53,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:53,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:57:53,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:57:53,871 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:53,921 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-11-16 19:57:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 19:57:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-16 19:57:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:53,923 INFO L225 Difference]: With dead ends: 45 [2022-11-16 19:57:53,923 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 19:57:53,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-16 19:57:53,924 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:53,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:57:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 19:57:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 19:57:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2022-11-16 19:57:53,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 10 [2022-11-16 19:57:53,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:53,928 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2022-11-16 19:57:53,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:53,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2022-11-16 19:57:53,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:57:53,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:53,929 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 19:57:53,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-16 19:57:54,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 19:57:54,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636301, now seen corresponding path program 2 times [2022-11-16 19:57:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:54,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993744333] [2022-11-16 19:57:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:54,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 19:57:54,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:54,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993744333] [2022-11-16 19:57:54,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993744333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:54,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:54,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:57:54,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291069045] [2022-11-16 19:57:54,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:54,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:57:54,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:54,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:57:54,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:57:54,263 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:54,399 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2022-11-16 19:57:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:57:54,400 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:57:54,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:54,400 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:57:54,400 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 19:57:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:57:54,401 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 201 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:54,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 44 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 19:57:54,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-11-16 19:57:54,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.696969696969697) internal successors, (56), 47 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-11-16 19:57:54,405 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 15 [2022-11-16 19:57:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:54,406 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-11-16 19:57:54,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,406 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-11-16 19:57:54,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 19:57:54,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:54,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 19:57:54,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 19:57:54,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1276636300, now seen corresponding path program 1 times [2022-11-16 19:57:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:54,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113266365] [2022-11-16 19:57:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:54,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:57:54,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113266365] [2022-11-16 19:57:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113266365] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:54,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:54,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:57:54,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983888675] [2022-11-16 19:57:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:57:54,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:54,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:57:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:57:54,705 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:54,878 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-16 19:57:54,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:57:54,879 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-16 19:57:54,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:54,879 INFO L225 Difference]: With dead ends: 72 [2022-11-16 19:57:54,880 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:57:54,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:57:54,880 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 299 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:54,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 33 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:57:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2022-11-16 19:57:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-16 19:57:54,884 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 15 [2022-11-16 19:57:54,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:54,887 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-16 19:57:54,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:54,887 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-16 19:57:54,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:57:54,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:54,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:57:54,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 19:57:54,888 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:54,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066666, now seen corresponding path program 1 times [2022-11-16 19:57:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:54,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983755894] [2022-11-16 19:57:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:54,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:57:54,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:54,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983755894] [2022-11-16 19:57:54,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983755894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:57:54,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:57:54,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:57:54,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476388578] [2022-11-16 19:57:54,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:57:54,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:57:54,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:57:54,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:57:54,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:57:54,992 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:55,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:57:55,146 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-11-16 19:57:55,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:57:55,146 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:57:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:57:55,147 INFO L225 Difference]: With dead ends: 133 [2022-11-16 19:57:55,147 INFO L226 Difference]: Without dead ends: 133 [2022-11-16 19:57:55,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:57:55,149 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:57:55,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 60 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:57:55,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-16 19:57:55,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 51. [2022-11-16 19:57:55,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:55,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-16 19:57:55,166 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 19 [2022-11-16 19:57:55,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:57:55,167 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-16 19:57:55,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:57:55,167 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-16 19:57:55,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 19:57:55,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:57:55,168 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:57:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 19:57:55,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:57:55,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:57:55,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1752066665, now seen corresponding path program 1 times [2022-11-16 19:57:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:57:55,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413348075] [2022-11-16 19:57:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:57:55,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:57:55,253 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:57:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413348075] [2022-11-16 19:57:55,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413348075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:57:55,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118725010] [2022-11-16 19:57:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:57:55,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:57:55,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:57:55,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:57:55,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 19:57:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:57:55,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 19:57:55,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:57:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:57:55,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:57:55,469 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:57:55,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118725010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:57:55,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [912741221] [2022-11-16 19:57:55,472 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-16 19:57:55,472 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:57:55,472 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:57:55,473 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:57:55,473 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:57:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,499 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:55,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:55,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:57:55,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:57:55,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:55,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:57:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:57:55,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:55,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:55,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:55,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:57:55,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:57:55,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:57:55,834 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:55,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:57:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:55,887 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:57:55,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-16 19:57:55,934 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:55,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 19:57:56,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:56,394 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:57:56,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 821 treesize of output 790 [2022-11-16 19:57:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:56,469 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:56,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 826 treesize of output 821 [2022-11-16 19:57:56,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:56,528 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:56,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 809 [2022-11-16 19:57:57,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,082 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:57:57,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-16 19:57:57,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,122 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:57,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:57:57,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,157 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:57:57,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2022-11-16 19:57:57,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,312 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:57:57,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-16 19:57:57,482 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:57,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:57:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,536 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:57:57,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-16 19:57:57,576 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:57:57,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 19:57:57,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:57,829 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:57:57,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2022-11-16 19:57:57,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,884 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:57,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2022-11-16 19:57:57,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:57,932 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:57:57,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-16 19:57:58,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:58,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:58,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:58,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:57:58,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,264 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:57:58,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 330 treesize of output 315 [2022-11-16 19:57:58,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,302 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:57:58,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 326 treesize of output 319 [2022-11-16 19:57:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:57:58,341 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 19:57:58,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 380 treesize of output 373 [2022-11-16 19:57:58,490 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,501 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:57:58,554 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:57:58,575 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,617 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,624 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:57:58,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:01,189 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1434#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|))) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:58:01,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:01,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:01,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-16 19:58:01,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4091577] [2022-11-16 19:58:01,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:01,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 19:58:01,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:01,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 19:58:01,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:58:01,192 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:01,252 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-11-16 19:58:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:58:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-11-16 19:58:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:01,254 INFO L225 Difference]: With dead ends: 68 [2022-11-16 19:58:01,254 INFO L226 Difference]: Without dead ends: 68 [2022-11-16 19:58:01,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:58:01,255 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 113 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:01,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 76 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-16 19:58:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2022-11-16 19:58:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 47 states have (on average 1.702127659574468) internal successors, (80), 61 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2022-11-16 19:58:01,259 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 19 [2022-11-16 19:58:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:01,259 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2022-11-16 19:58:01,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2022-11-16 19:58:01,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:58:01,260 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:01,260 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:01,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-16 19:58:01,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:01,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:01,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1407041625, now seen corresponding path program 1 times [2022-11-16 19:58:01,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:01,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681814144] [2022-11-16 19:58:01,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:01,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:01,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:01,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:01,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681814144] [2022-11-16 19:58:01,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681814144] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:01,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748262253] [2022-11-16 19:58:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:01,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:01,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:01,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:01,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 19:58:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:01,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:58:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:01,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:01,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:01,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748262253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:01,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497327078] [2022-11-16 19:58:01,768 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:58:01,768 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:01,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:01,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:01,769 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:01,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,793 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:01,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:01,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:01,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:01,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:01,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:01,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:01,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:01,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:01,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:01,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:01,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:01,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:02,070 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:02,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:02,101 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:02,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 19:58:02,145 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:02,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:02,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:02,532 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:02,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 989 treesize of output 938 [2022-11-16 19:58:02,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:02,604 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:02,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 986 treesize of output 981 [2022-11-16 19:58:02,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:02,664 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:02,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2022-11-16 19:58:03,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:03,252 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:03,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 293 treesize of output 278 [2022-11-16 19:58:03,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:03,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:03,285 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:03,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 289 treesize of output 282 [2022-11-16 19:58:03,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:03,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:03,317 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:03,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 19:58:03,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,464 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:03,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 350 treesize of output 353 [2022-11-16 19:58:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,656 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:03,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:58:03,694 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:03,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:03,735 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:03,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:03,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:03,983 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:03,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:58:04,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:04,034 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:04,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2022-11-16 19:58:04,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,090 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:04,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 551 treesize of output 532 [2022-11-16 19:58:04,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,413 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:04,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:58:04,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:04,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:04,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:04,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,446 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:04,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 309 treesize of output 294 [2022-11-16 19:58:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:04,477 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:04,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2022-11-16 19:58:04,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:04,603 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,614 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:04,715 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,724 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,839 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:04,860 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,903 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,910 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:04,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:07,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1696#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:58:07,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:07,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:07,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-16 19:58:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538650750] [2022-11-16 19:58:07,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:58:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:58:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-11-16 19:58:07,290 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-11-16 19:58:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:07,420 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-16 19:58:07,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:58:07,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 20 [2022-11-16 19:58:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:07,422 INFO L225 Difference]: With dead ends: 88 [2022-11-16 19:58:07,422 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 19:58:07,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:58:07,423 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 88 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:07,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 92 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 19:58:07,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 65. [2022-11-16 19:58:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.68) internal successors, (84), 64 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2022-11-16 19:58:07,428 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 20 [2022-11-16 19:58:07,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:07,428 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2022-11-16 19:58:07,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2022-11-16 19:58:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2022-11-16 19:58:07,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:58:07,429 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:07,429 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:07,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:07,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:07,635 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:07,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045197, now seen corresponding path program 1 times [2022-11-16 19:58:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146059464] [2022-11-16 19:58:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:08,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146059464] [2022-11-16 19:58:08,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146059464] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079702951] [2022-11-16 19:58:08,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:08,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:08,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:08,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 19:58:08,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 19:58:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:08,468 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:58:08,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-16 19:58:08,517 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:08,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:08,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-11-16 19:58:08,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-16 19:58:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:08,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:11,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079702951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:11,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1260239644] [2022-11-16 19:58:11,098 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:58:11,099 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:11,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:11,099 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:11,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,126 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:11,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:11,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:11,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:11,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:11,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,225 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:11,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:11,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:11,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:11,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:11,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:11,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:11,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,434 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:58:11,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-16 19:58:11,481 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:11,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2022-11-16 19:58:11,529 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:11,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 19:58:11,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:11,796 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:58:11,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 308 treesize of output 313 [2022-11-16 19:58:11,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,856 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:11,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 317 treesize of output 318 [2022-11-16 19:58:11,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:11,908 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:11,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-16 19:58:12,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,315 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:12,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 332 treesize of output 317 [2022-11-16 19:58:12,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,355 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:12,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 328 treesize of output 321 [2022-11-16 19:58:12,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:12,397 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 19:58:12,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 382 treesize of output 375 [2022-11-16 19:58:12,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,583 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:12,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 455 treesize of output 458 [2022-11-16 19:58:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:12,870 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:58:12,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 290 treesize of output 282 [2022-11-16 19:58:12,915 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:12,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 280 treesize of output 287 [2022-11-16 19:58:12,961 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:12,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 19:58:13,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:13,351 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:58:13,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 821 treesize of output 790 [2022-11-16 19:58:13,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:13,432 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:13,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 826 treesize of output 821 [2022-11-16 19:58:13,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:13,495 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:13,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 814 treesize of output 809 [2022-11-16 19:58:14,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:14,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:14,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:14,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:14,129 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:14,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-16 19:58:14,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:14,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:14,165 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:14,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:58:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:14,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:14,199 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:58:14,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2022-11-16 19:58:14,336 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,346 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:14,441 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:14,459 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:14,555 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,563 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,590 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,598 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:14,601 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:17,489 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2002#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (not (< 0 |ULTIMATE.start_sll_update_at_~index#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:58:17,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:17,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:17,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 22 [2022-11-16 19:58:17,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333184355] [2022-11-16 19:58:17,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 19:58:17,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 19:58:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=932, Unknown=1, NotChecked=0, Total=1056 [2022-11-16 19:58:17,492 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:18,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:18,182 INFO L93 Difference]: Finished difference Result 131 states and 168 transitions. [2022-11-16 19:58:18,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 19:58:18,183 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 19:58:18,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:18,184 INFO L225 Difference]: With dead ends: 131 [2022-11-16 19:58:18,184 INFO L226 Difference]: Without dead ends: 131 [2022-11-16 19:58:18,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=259, Invalid=1380, Unknown=1, NotChecked=0, Total=1640 [2022-11-16 19:58:18,185 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 597 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:18,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 167 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 375 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-11-16 19:58:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-16 19:58:18,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 72. [2022-11-16 19:58:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 71 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 96 transitions. [2022-11-16 19:58:18,189 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 96 transitions. Word has length 20 [2022-11-16 19:58:18,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:18,189 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 96 transitions. [2022-11-16 19:58:18,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:18,189 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 96 transitions. [2022-11-16 19:58:18,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 19:58:18,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:18,190 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:18,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:18,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 19:58:18,390 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:18,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:18,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1407045198, now seen corresponding path program 1 times [2022-11-16 19:58:18,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:18,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507520072] [2022-11-16 19:58:18,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:18,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:19,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:19,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:19,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507520072] [2022-11-16 19:58:19,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507520072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:19,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747868964] [2022-11-16 19:58:19,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:19,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:19,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:19,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:19,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 19:58:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:19,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-16 19:58:19,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:19,509 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:58:19,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 19:58:19,525 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 19:58:19,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 19:58:19,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:19,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:19,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 33 [2022-11-16 19:58:19,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:19,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2022-11-16 19:58:19,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 21 [2022-11-16 19:58:19,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-16 19:58:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:19,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:20,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 44 [2022-11-16 19:58:20,582 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-16 19:58:20,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 57 [2022-11-16 19:58:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:58:20,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747868964] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [600280124] [2022-11-16 19:58:20,631 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:58:20,631 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:20,632 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:20,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,654 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:20,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:20,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:20,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:20,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:20,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:20,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:20,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:20,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:20,790 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:20,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:20,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:20,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:20,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:20,919 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:20,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:58:20,959 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:20,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:21,011 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:21,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:21,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,187 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:21,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:21,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,241 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:21,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2022-11-16 19:58:21,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,298 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:21,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-16 19:58:21,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,638 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:21,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 325 treesize of output 318 [2022-11-16 19:58:21,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,679 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:58:21,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 409 treesize of output 402 [2022-11-16 19:58:21,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:21,724 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:21,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 461 treesize of output 446 [2022-11-16 19:58:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:21,910 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:21,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 446 treesize of output 441 [2022-11-16 19:58:22,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,084 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:22,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:58:22,124 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:22,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:22,167 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:22,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:22,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,389 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:22,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:58:22,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,441 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:22,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2022-11-16 19:58:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,493 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:22,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 551 treesize of output 532 [2022-11-16 19:58:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,825 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:22,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 324 [2022-11-16 19:58:22,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,861 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:58:22,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 421 treesize of output 414 [2022-11-16 19:58:22,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:22,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:22,895 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:22,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 473 treesize of output 458 [2022-11-16 19:58:23,032 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:23,054 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,139 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:23,165 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:23,291 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,303 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,349 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,356 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:23,359 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:26,688 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2378#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (or (not (<= 0 |ULTIMATE.start_sll_update_at_~head#1.offset|)) (not (<= (+ 4 |ULTIMATE.start_sll_update_at_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_update_at_~head#1.base|)))) (not (< 0 |ULTIMATE.start_sll_update_at_~index#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:58:26,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:26,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:26,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 29 [2022-11-16 19:58:26,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250041171] [2022-11-16 19:58:26,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:26,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 19:58:26,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 19:58:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1416, Unknown=0, NotChecked=0, Total=1560 [2022-11-16 19:58:26,692 INFO L87 Difference]: Start difference. First operand 72 states and 96 transitions. Second operand has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:28,620 INFO L93 Difference]: Finished difference Result 202 states and 258 transitions. [2022-11-16 19:58:28,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 19:58:28,620 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 19:58:28,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:28,622 INFO L225 Difference]: With dead ends: 202 [2022-11-16 19:58:28,622 INFO L226 Difference]: Without dead ends: 202 [2022-11-16 19:58:28,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2022-11-16 19:58:28,623 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1700 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1700 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:28,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1700 Valid, 174 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 549 Invalid, 0 Unknown, 37 Unchecked, 0.6s Time] [2022-11-16 19:58:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-11-16 19:58:28,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 77. [2022-11-16 19:58:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 76 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 104 transitions. [2022-11-16 19:58:28,630 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 104 transitions. Word has length 20 [2022-11-16 19:58:28,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:28,630 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 104 transitions. [2022-11-16 19:58:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:28,630 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 104 transitions. [2022-11-16 19:58:28,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-16 19:58:28,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:28,631 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:28,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:28,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 19:58:28,835 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1734910987, now seen corresponding path program 2 times [2022-11-16 19:58:28,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:28,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69366124] [2022-11-16 19:58:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:28,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69366124] [2022-11-16 19:58:28,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69366124] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372014546] [2022-11-16 19:58:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:58:28,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:28,928 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:28,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 19:58:29,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:58:29,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:58:29,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 19:58:29,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:29,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:58:29,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:58:29,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372014546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:29,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:58:29,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-11-16 19:58:29,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235156554] [2022-11-16 19:58:29,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:29,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:58:29,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:29,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:58:29,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-16 19:58:29,157 INFO L87 Difference]: Start difference. First operand 77 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:29,276 INFO L93 Difference]: Finished difference Result 95 states and 120 transitions. [2022-11-16 19:58:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:58:29,278 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-16 19:58:29,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:29,279 INFO L225 Difference]: With dead ends: 95 [2022-11-16 19:58:29,279 INFO L226 Difference]: Without dead ends: 95 [2022-11-16 19:58:29,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-16 19:58:29,280 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:29,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 46 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:29,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-16 19:58:29,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2022-11-16 19:58:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 76 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) [2022-11-16 19:58:29,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 100 transitions. [2022-11-16 19:58:29,284 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 100 transitions. Word has length 22 [2022-11-16 19:58:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:29,284 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 100 transitions. [2022-11-16 19:58:29,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 100 transitions. [2022-11-16 19:58:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-16 19:58:29,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:29,285 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:29,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-16 19:58:29,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:29,490 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash -802088496, now seen corresponding path program 1 times [2022-11-16 19:58:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004777556] [2022-11-16 19:58:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:29,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:29,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:29,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004777556] [2022-11-16 19:58:29,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004777556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:29,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610413154] [2022-11-16 19:58:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:29,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:29,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:29,594 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 19:58:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:29,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:58:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:29,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:29,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 19:58:29,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610413154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:29,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159622785] [2022-11-16 19:58:29,797 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-11-16 19:58:29,798 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:29,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:29,798 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:29,798 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:29,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,821 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:29,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:29,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:29,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:29,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:29,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:29,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:29,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:29,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:29,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:29,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:29,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:30,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:30,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,141 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:58:30,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 19:58:30,187 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:30,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 19:58:30,233 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:30,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 19:58:30,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:30,475 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:58:30,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2022-11-16 19:58:30,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,536 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:30,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 325 [2022-11-16 19:58:30,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:30,588 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:30,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,089 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:31,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 19:58:31,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,126 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:31,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 313 treesize of output 298 [2022-11-16 19:58:31,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,159 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:31,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 309 treesize of output 302 [2022-11-16 19:58:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,301 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:31,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-16 19:58:31,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,523 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:58:31,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 19:58:31,571 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:31,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 19:58:31,615 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:31,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 19:58:31,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:31,835 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:58:31,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 315 treesize of output 320 [2022-11-16 19:58:31,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,892 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:31,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 324 treesize of output 325 [2022-11-16 19:58:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:31,938 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:31,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:32,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:32,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:32,234 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:32,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2022-11-16 19:58:32,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:32,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:32,269 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:32,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 19:58:32,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:32,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:32,302 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:58:32,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-11-16 19:58:32,417 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,426 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:32,479 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:32,496 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,559 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,565 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:32,569 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:35,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3093#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-16 19:58:35,520 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:35,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:35,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-11-16 19:58:35,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198951697] [2022-11-16 19:58:35,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:35,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:58:35,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:58:35,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:58:35,522 INFO L87 Difference]: Start difference. First operand 77 states and 100 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:35,617 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2022-11-16 19:58:35,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:58:35,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-16 19:58:35,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:35,618 INFO L225 Difference]: With dead ends: 77 [2022-11-16 19:58:35,618 INFO L226 Difference]: Without dead ends: 77 [2022-11-16 19:58:35,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:58:35,619 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 58 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:35,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 125 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:35,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-16 19:58:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-11-16 19:58:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 56 states have (on average 1.5714285714285714) internal successors, (88), 70 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-11-16 19:58:35,622 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 24 [2022-11-16 19:58:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:35,622 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-11-16 19:58:35,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-11-16 19:58:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 19:58:35,623 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:35,623 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-11-16 19:58:35,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:35,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-16 19:58:35,824 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:35,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:35,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1047313855, now seen corresponding path program 2 times [2022-11-16 19:58:35,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:35,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162968526] [2022-11-16 19:58:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:35,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 19:58:35,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162968526] [2022-11-16 19:58:35,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162968526] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:35,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414044920] [2022-11-16 19:58:35,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 19:58:35,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:35,942 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:35,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 19:58:36,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 19:58:36,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 19:58:36,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:58:36,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:36,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:36,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414044920] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:36,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760153004] [2022-11-16 19:58:36,210 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-16 19:58:36,210 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:36,210 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:36,210 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:36,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,234 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:36,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:36,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:36,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:36,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:36,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:36,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:36,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:36,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:36,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,476 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:36,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:58:36,516 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:36,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:36,554 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:36,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:36,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,777 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:36,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:58:36,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:36,842 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:36,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2022-11-16 19:58:36,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:36,905 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:36,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:58:37,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:37,307 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:37,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 322 treesize of output 315 [2022-11-16 19:58:37,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:37,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:37,349 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 19:58:37,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 364 treesize of output 357 [2022-11-16 19:58:37,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:37,378 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:37,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 452 treesize of output 437 [2022-11-16 19:58:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,554 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:37,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 437 treesize of output 432 [2022-11-16 19:58:37,761 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:37,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:37,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:37,791 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:37,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 19:58:37,831 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:37,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:37,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:38,016 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:38,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:38,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:38,068 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:38,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-16 19:58:38,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,118 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:38,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2022-11-16 19:58:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:38,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:38,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:38,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,369 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:58:38,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-16 19:58:38,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,406 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:38,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 19:58:38,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:38,443 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:38,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2022-11-16 19:58:38,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:38,588 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,598 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:38,676 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,684 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:38,765 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,775 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,805 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,811 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:38,815 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:41,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3408#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_update_at_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= 0 |ULTIMATE.start_sll_update_at_#in~index#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_~data#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_update_at_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 2 |ULTIMATE.start_sll_update_at_#in~data#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~new_data~0#1|) (< 0 |ULTIMATE.start_sll_update_at_~index#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_update_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:58:41,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:41,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:41,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-11-16 19:58:41,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855299972] [2022-11-16 19:58:41,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:41,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-16 19:58:41,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:41,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-16 19:58:41,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-11-16 19:58:41,298 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:41,419 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-11-16 19:58:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:58:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-16 19:58:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:41,420 INFO L225 Difference]: With dead ends: 62 [2022-11-16 19:58:41,421 INFO L226 Difference]: Without dead ends: 62 [2022-11-16 19:58:41,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-11-16 19:58:41,421 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:41,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 80 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:58:41,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-16 19:58:41,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-11-16 19:58:41,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.4666666666666666) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2022-11-16 19:58:41,424 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 25 [2022-11-16 19:58:41,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:41,424 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2022-11-16 19:58:41,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:41,424 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2022-11-16 19:58:41,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 19:58:41,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:41,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:41,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:41,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-16 19:58:41,625 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:41,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:41,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1624515148, now seen corresponding path program 1 times [2022-11-16 19:58:41,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:41,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507035084] [2022-11-16 19:58:41,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:41,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:58:42,596 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507035084] [2022-11-16 19:58:42,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507035084] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:42,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840369986] [2022-11-16 19:58:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:42,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:42,598 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:42,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 19:58:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:42,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-16 19:58:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:42,830 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 19:58:42,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 19:58:42,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:43,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:43,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 19:58:43,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:43,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 8 [2022-11-16 19:58:43,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 19:58:43,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:58:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:58:43,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:43,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-16 19:58:43,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:58:43,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840369986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:43,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [367072771] [2022-11-16 19:58:43,855 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-16 19:58:43,855 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:43,855 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:43,856 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:43,856 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:43,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,881 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:43,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:43,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:43,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:43,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:43,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:44,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:44,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:44,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:44,169 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:44,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:44,216 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:44,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:44,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,244 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:44,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 285 treesize of output 267 [2022-11-16 19:58:44,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,472 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:44,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 19:58:44,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,521 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:44,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2022-11-16 19:58:44,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:44,582 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:44,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:58:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,966 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:44,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 311 [2022-11-16 19:58:44,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:44,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:45,007 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 19:58:45,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 360 treesize of output 353 [2022-11-16 19:58:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:45,037 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:45,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 442 treesize of output 427 [2022-11-16 19:58:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,189 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:45,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 427 treesize of output 422 [2022-11-16 19:58:45,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,367 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:45,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:58:45,407 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:45,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:45,449 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:45,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:45,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,632 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:45,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:45,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:45,685 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-16 19:58:45,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:45,735 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:45,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2022-11-16 19:58:46,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:46,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:46,038 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:46,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 19:58:46,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:46,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:46,075 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:58:46,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2022-11-16 19:58:46,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:46,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:46,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:46,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:46,103 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:46,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 395 treesize of output 380 [2022-11-16 19:58:46,216 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,229 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:46,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:46,361 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,372 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,485 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,493 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:46,495 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:58:50,805 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3734#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-16 19:58:50,805 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:58:50,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:58:50,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2022-11-16 19:58:50,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602462644] [2022-11-16 19:58:50,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:58:50,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 19:58:50,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 19:58:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2529, Unknown=0, NotChecked=0, Total=2756 [2022-11-16 19:58:50,808 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:51,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:51,934 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-11-16 19:58:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 19:58:51,935 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 19:58:51,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:51,935 INFO L225 Difference]: With dead ends: 80 [2022-11-16 19:58:51,935 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 19:58:51,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=611, Invalid=4501, Unknown=0, NotChecked=0, Total=5112 [2022-11-16 19:58:51,938 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 666 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:51,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 173 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 520 Invalid, 0 Unknown, 44 Unchecked, 0.4s Time] [2022-11-16 19:58:51,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 19:58:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2022-11-16 19:58:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-16 19:58:51,941 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 26 [2022-11-16 19:58:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:51,942 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-16 19:58:51,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.7) internal successors, (68), 40 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-16 19:58:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 19:58:51,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:51,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:51,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 19:58:52,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:52,148 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1622162611, now seen corresponding path program 1 times [2022-11-16 19:58:52,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:52,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296569455] [2022-11-16 19:58:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:52,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:52,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:52,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:52,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296569455] [2022-11-16 19:58:52,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296569455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:58:52,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:58:52,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 19:58:52,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121988137] [2022-11-16 19:58:52,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:58:52,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 19:58:52,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:58:52,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 19:58:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 19:58:52,230 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:52,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:58:52,283 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-11-16 19:58:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:58:52,284 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-11-16 19:58:52,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:58:52,285 INFO L225 Difference]: With dead ends: 52 [2022-11-16 19:58:52,285 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 19:58:52,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 19:58:52,285 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 19:58:52,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 63 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 19:58:52,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 19:58:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 19:58:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-11-16 19:58:52,288 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 26 [2022-11-16 19:58:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:58:52,288 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-11-16 19:58:52,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:58:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-11-16 19:58:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:58:52,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:58:52,289 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:58:52,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 19:58:52,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:58:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:58:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash 96397018, now seen corresponding path program 1 times [2022-11-16 19:58:52,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:58:52,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451938001] [2022-11-16 19:58:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:58:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:52,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:58:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451938001] [2022-11-16 19:58:52,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451938001] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:58:52,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877002993] [2022-11-16 19:58:52,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:58:52,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:58:52,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:58:52,389 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:58:52,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 19:58:52,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:58:52,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 19:58:52,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:58:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:52,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:58:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:58:52,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877002993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:58:52,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [46104195] [2022-11-16 19:58:52,630 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-16 19:58:52,630 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:58:52,630 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:58:52,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:58:52,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:58:52,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,672 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:52,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:58:52,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:52,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:58:52,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:52,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:58:52,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:58:52,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:58:52,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:52,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:52,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:52,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:58:52,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:58:52,955 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:52,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:52,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:52,982 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:52,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 19:58:53,025 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:53,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,207 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:53,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,260 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:53,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-16 19:58:53,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,311 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:53,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2022-11-16 19:58:53,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,592 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:53,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 329 treesize of output 322 [2022-11-16 19:58:53,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,642 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 19:58:53,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 370 [2022-11-16 19:58:53,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:53,681 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:53,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 456 [2022-11-16 19:58:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:53,876 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:58:53,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 456 treesize of output 451 [2022-11-16 19:58:54,106 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:54,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:58:54,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,130 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:58:54,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 19:58:54,169 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:58:54,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:58:54,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,326 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:54,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:58:54,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,380 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:58:54,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2022-11-16 19:58:54,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,432 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:58:54,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-16 19:58:54,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,715 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:58:54,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 329 treesize of output 322 [2022-11-16 19:58:54,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,754 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:58:54,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 419 treesize of output 412 [2022-11-16 19:58:54,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:58:54,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:58:54,785 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:58:54,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 456 [2022-11-16 19:58:54,922 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:54,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:54,942 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:55,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:58:55,147 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:58:55,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 148 [2022-11-16 19:58:55,183 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:58:55,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 142 [2022-11-16 19:58:55,524 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:55,531 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:58:55,535 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:00,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4212#(and (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select (select |#memory_int| |ULTIMATE.start_sll_get_data_at_~head#1.base|) |ULTIMATE.start_sll_get_data_at_~head#1.offset|) |ULTIMATE.start_sll_get_data_at_#res#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (not (= |ULTIMATE.start_sll_get_data_at_#res#1| |ULTIMATE.start_main_~expected~0#1|)) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-16 19:59:00,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:00,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:00,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-11-16 19:59:00,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321840599] [2022-11-16 19:59:00,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:00,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 19:59:00,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 19:59:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-16 19:59:00,459 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:00,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:00,530 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-11-16 19:59:00,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 19:59:00,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 19:59:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:00,531 INFO L225 Difference]: With dead ends: 51 [2022-11-16 19:59:00,531 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 19:59:00,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:59:00,532 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:00,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 64 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:00,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 19:59:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-16 19:59:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 40 states have (on average 1.325) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-11-16 19:59:00,535 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 30 [2022-11-16 19:59:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:00,535 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-11-16 19:59:00,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-11-16 19:59:00,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:59:00,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:00,536 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:00,546 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:00,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:00,746 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:00,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 94044481, now seen corresponding path program 1 times [2022-11-16 19:59:00,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:00,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343915792] [2022-11-16 19:59:00,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:00,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:02,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343915792] [2022-11-16 19:59:02,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343915792] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:02,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620738396] [2022-11-16 19:59:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:02,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:02,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:02,139 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:02,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 19:59:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 19:59:02,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:02,345 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:02,432 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 19:59:02,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 19:59:02,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:02,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:02,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 19:59:02,781 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 19:59:02,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 19:59:02,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:59:02,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:02,997 INFO L321 Elim1Store]: treesize reduction 5, result has 70.6 percent of original size [2022-11-16 19:59:02,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 19:59:03,070 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))))) is different from false [2022-11-16 19:59:03,079 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1309 (Array Int Int))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) .cse0)))) is different from false [2022-11-16 19:59:03,087 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_1307))) (.cse2 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_1309) |c_ULTIMATE.start_main_~s~0#1.base|) .cse2))))) is different from false [2022-11-16 19:59:03,193 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_67| Int) (v_ArrVal_1307 Int) (v_ArrVal_1309 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_67| v_ArrVal_1307)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (let ((.cse0 (select .cse1 .cse2))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_1309) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse2)))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_67|))) is different from false [2022-11-16 19:59:03,203 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:03,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 51 [2022-11-16 19:59:03,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:03,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:03,215 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:03,215 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 27 treesize of output 31 [2022-11-16 19:59:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 24 [2022-11-16 19:59:03,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-16 19:59:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2022-11-16 19:59:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620738396] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:03,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [752254383] [2022-11-16 19:59:03,425 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-16 19:59:03,425 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:03,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:03,426 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:03,426 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:03,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,452 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:03,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:59:03,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:03,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:03,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:03,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:59:03,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:59:03,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:03,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:03,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:03,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:03,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:59:03,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:03,703 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:03,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-16 19:59:03,742 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:03,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:59:03,785 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:03,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:59:03,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,010 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:04,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:59:04,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,068 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:04,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 524 [2022-11-16 19:59:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,122 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:04,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-16 19:59:04,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,561 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:59:04,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 19:59:04,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,593 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:59:04,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2022-11-16 19:59:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:04,627 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:59:04,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2022-11-16 19:59:04,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,785 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:59:04,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-16 19:59:04,936 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:04,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:59:04,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:04,971 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:04,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-16 19:59:05,010 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:05,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:59:05,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,159 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:05,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 311 treesize of output 312 [2022-11-16 19:59:05,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,205 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:05,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 292 treesize of output 293 [2022-11-16 19:59:05,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,254 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:05,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 302 [2022-11-16 19:59:05,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,469 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:59:05,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 331 treesize of output 324 [2022-11-16 19:59:05,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,507 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:59:05,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 421 treesize of output 414 [2022-11-16 19:59:05,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:05,546 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:59:05,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 473 treesize of output 458 [2022-11-16 19:59:05,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:05,692 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:05,703 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:05,898 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:05,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2022-11-16 19:59:05,935 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:05,935 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 140 [2022-11-16 19:59:06,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:06,527 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:06,535 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:06,537 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:12,183 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4549#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_sll_get_data_at_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:59:12,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:12,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:12,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 15] total 44 [2022-11-16 19:59:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475972849] [2022-11-16 19:59:12,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:12,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-16 19:59:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-16 19:59:12,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2736, Unknown=20, NotChecked=436, Total=3422 [2022-11-16 19:59:12,186 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:14,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:14,005 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-11-16 19:59:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 19:59:14,006 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 19:59:14,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:14,006 INFO L225 Difference]: With dead ends: 72 [2022-11-16 19:59:14,006 INFO L226 Difference]: Without dead ends: 72 [2022-11-16 19:59:14,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=604, Invalid=5242, Unknown=22, NotChecked=612, Total=6480 [2022-11-16 19:59:14,009 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 401 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:14,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [401 Valid, 284 Invalid, 1180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 903 Invalid, 0 Unknown, 241 Unchecked, 0.6s Time] [2022-11-16 19:59:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-16 19:59:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-11-16 19:59:14,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.372093023255814) internal successors, (59), 53 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2022-11-16 19:59:14,011 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 30 [2022-11-16 19:59:14,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2022-11-16 19:59:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.9090909090909092) internal successors, (84), 45 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:14,012 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2022-11-16 19:59:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:59:14,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:14,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:14,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:14,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:14,218 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:14,218 INFO L85 PathProgramCache]: Analyzing trace with hash 94044482, now seen corresponding path program 1 times [2022-11-16 19:59:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:14,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191406674] [2022-11-16 19:59:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:14,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:16,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191406674] [2022-11-16 19:59:16,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191406674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:16,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234220419] [2022-11-16 19:59:16,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:16,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:16,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:16,017 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:16,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 19:59:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:16,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-16 19:59:16,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:16,232 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 19:59:16,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 19:59:16,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:16,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 19:59:16,572 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 19:59:16,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2022-11-16 19:59:16,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:16,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 41 [2022-11-16 19:59:16,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-16 19:59:16,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-11-16 19:59:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:59:16,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:16,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:16,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 51 [2022-11-16 19:59:17,139 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:17,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 109 [2022-11-16 19:59:17,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 89 [2022-11-16 19:59:17,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 85 [2022-11-16 19:59:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 19:59:17,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234220419] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:17,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1505188699] [2022-11-16 19:59:17,591 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-16 19:59:17,591 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:17,591 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:17,591 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:17,591 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:17,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,615 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:17,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:59:17,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:17,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:17,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:59:17,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:17,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:17,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:17,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:17,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:59:17,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:17,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:17,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:59:17,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:17,843 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:17,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-16 19:59:17,882 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:17,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:59:17,919 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:17,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:59:18,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,161 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:18,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 19:59:18,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,216 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:18,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 543 treesize of output 524 [2022-11-16 19:59:18,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,268 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:18,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 548 treesize of output 549 [2022-11-16 19:59:18,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,688 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:59:18,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2022-11-16 19:59:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,721 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:59:18,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 381 treesize of output 366 [2022-11-16 19:59:18,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:18,756 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:59:18,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 370 [2022-11-16 19:59:18,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:18,894 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:59:18,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 396 treesize of output 399 [2022-11-16 19:59:19,066 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:19,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:59:19,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:19,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:19,090 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:19,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-16 19:59:19,126 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:19,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:59:19,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:19,487 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:19,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2022-11-16 19:59:19,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:19,562 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:19,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2022-11-16 19:59:19,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:19,617 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:19,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2022-11-16 19:59:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:20,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:20,085 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:59:20,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 307 treesize of output 300 [2022-11-16 19:59:20,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:20,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:20,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:20,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:20,115 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 19:59:20,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2022-11-16 19:59:20,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:20,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:20,147 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:59:20,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2022-11-16 19:59:20,300 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:20,324 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,418 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:20,435 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,800 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,807 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:20,809 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:25,330 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4950#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= |ULTIMATE.start_main_~expected~0#1| 4) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (or (not (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|)) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|)))) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~index#1| 2) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:59:25,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:25,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:25,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 41 [2022-11-16 19:59:25,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215451573] [2022-11-16 19:59:25,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:25,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-16 19:59:25,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:25,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-16 19:59:25,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2862, Unknown=0, NotChecked=0, Total=3080 [2022-11-16 19:59:25,333 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:27,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:27,743 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-11-16 19:59:27,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 19:59:27,743 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 19:59:27,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:27,744 INFO L225 Difference]: With dead ends: 75 [2022-11-16 19:59:27,744 INFO L226 Difference]: Without dead ends: 75 [2022-11-16 19:59:27,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=642, Invalid=5520, Unknown=0, NotChecked=0, Total=6162 [2022-11-16 19:59:27,746 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 343 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:27,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 273 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 741 Invalid, 0 Unknown, 68 Unchecked, 0.6s Time] [2022-11-16 19:59:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-16 19:59:27,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2022-11-16 19:59:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 53 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:27,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2022-11-16 19:59:27,748 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 30 [2022-11-16 19:59:27,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:27,748 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2022-11-16 19:59:27,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.0) internal successors, (82), 42 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:27,749 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2022-11-16 19:59:27,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 19:59:27,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:27,749 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:27,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:27,955 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:27,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 94042026, now seen corresponding path program 1 times [2022-11-16 19:59:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:27,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626662650] [2022-11-16 19:59:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:59:28,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:28,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626662650] [2022-11-16 19:59:28,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626662650] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:28,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222581355] [2022-11-16 19:59:28,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:28,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:28,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:28,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:28,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 19:59:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:28,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 19:59:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:28,294 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:59:28,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 19:59:28,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222581355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:28,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297532173] [2022-11-16 19:59:28,332 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-16 19:59:28,333 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:28,333 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:28,333 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:28,334 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:28,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,355 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:28,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:59:28,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:28,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:28,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:28,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:59:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:28,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:59:28,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:28,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:28,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:28,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:59:28,641 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:28,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:59:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,670 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:28,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 19:59:28,713 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:28,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:59:28,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,877 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:28,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:59:28,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:28,923 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:28,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-16 19:59:28,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:28,971 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:28,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2022-11-16 19:59:29,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,234 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:59:29,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2022-11-16 19:59:29,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,267 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:59:29,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 19:59:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,301 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 19:59:29,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-11-16 19:59:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,442 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:59:29,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-16 19:59:29,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,587 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:29,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 19:59:29,624 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:29,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 19:59:29,661 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:29,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 19:59:29,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,811 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:29,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 19:59:29,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:29,860 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:29,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2022-11-16 19:59:29,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:29,910 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:29,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-16 19:59:30,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:30,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:30,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:30,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:30,121 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:59:30,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-16 19:59:30,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:30,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:30,165 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:59:30,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 19:59:30,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:30,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:30,201 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 19:59:30,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2022-11-16 19:59:30,328 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:30,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:30,388 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:30,566 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:30,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 148 [2022-11-16 19:59:30,603 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:30,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 142 [2022-11-16 19:59:30,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:31,174 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:31,180 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:31,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:35,261 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5322#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_main_~i~0#1|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (+ |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~expected~0#1|) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_main_~len~0#1| 2) (not (<= (+ |ULTIMATE.start_sll_get_data_at_~head#1.offset| 8) (select |#length| |ULTIMATE.start_sll_get_data_at_~head#1.base|))) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (< 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| |ULTIMATE.start_main_~s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_main_~s~0#1.base|) (= |ULTIMATE.start_sll_get_data_at_#in~index#1| |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_sll_get_data_at_#in~head#1.base| |ULTIMATE.start_sll_get_data_at_~head#1.base|) (< |ULTIMATE.start_main_~i~0#1| |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 19:59:35,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:35,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:35,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-11-16 19:59:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75841024] [2022-11-16 19:59:35,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:35,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:59:35,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:59:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2022-11-16 19:59:35,264 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:35,353 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2022-11-16 19:59:35,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 19:59:35,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-11-16 19:59:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:35,354 INFO L225 Difference]: With dead ends: 46 [2022-11-16 19:59:35,354 INFO L226 Difference]: Without dead ends: 46 [2022-11-16 19:59:35,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2022-11-16 19:59:35,355 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:35,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 69 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:35,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-16 19:59:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-11-16 19:59:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.205128205128205) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-11-16 19:59:35,357 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 30 [2022-11-16 19:59:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:35,358 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-11-16 19:59:35,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-11-16 19:59:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 19:59:35,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:35,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:35,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:35,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-16 19:59:35,559 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:35,559 INFO L85 PathProgramCache]: Analyzing trace with hash 182493149, now seen corresponding path program 1 times [2022-11-16 19:59:35,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:35,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87101035] [2022-11-16 19:59:35,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:35,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:37,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87101035] [2022-11-16 19:59:37,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87101035] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:37,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387285718] [2022-11-16 19:59:37,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:37,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:37,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:37,111 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:37,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 19:59:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-16 19:59:37,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:37,390 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 19:59:37,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 19:59:37,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:37,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 19:59:37,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 19:59:37,851 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 19:59:37,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 61 [2022-11-16 19:59:37,857 INFO L350 Elim1Store]: Elim1 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 31 treesize of output 21 [2022-11-16 19:59:37,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:37,862 INFO L350 Elim1Store]: Elim1 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 34 treesize of output 36 [2022-11-16 19:59:38,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-16 19:59:38,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 19:59:38,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 19:59:38,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:38,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:38,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-16 19:59:38,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-16 19:59:39,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 174 [2022-11-16 19:59:39,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 149 [2022-11-16 19:59:39,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 149 treesize of output 133 [2022-11-16 19:59:39,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-16 19:59:39,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 19:59:39,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387285718] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:39,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [856823757] [2022-11-16 19:59:39,534 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-16 19:59:39,534 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:39,534 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:39,534 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:39,535 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:39,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,565 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:39,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:59:39,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:39,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:39,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:39,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:59:39,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:39,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:39,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:39,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:39,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:59:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:59:39,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:39,825 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:59:39,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 19:59:39,873 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:39,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 19:59:39,912 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:39,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 19:59:40,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,216 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:59:40,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 573 treesize of output 558 [2022-11-16 19:59:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,276 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:40,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 578 treesize of output 579 [2022-11-16 19:59:40,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,324 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:40,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 572 treesize of output 573 [2022-11-16 19:59:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,641 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:59:40,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 341 treesize of output 326 [2022-11-16 19:59:40,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,678 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:59:40,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 337 treesize of output 330 [2022-11-16 19:59:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:40,712 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:59:40,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 427 treesize of output 420 [2022-11-16 19:59:40,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:40,888 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 19:59:40,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 476 treesize of output 471 [2022-11-16 19:59:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:41,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:41,086 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 19:59:41,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 19:59:41,127 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:41,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 19:59:41,165 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:41,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 19:59:41,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:41,630 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:41,630 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1014 treesize of output 1003 [2022-11-16 19:59:41,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:41,701 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 19:59:41,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 983 treesize of output 940 [2022-11-16 19:59:41,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:41,763 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:41,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 984 treesize of output 979 [2022-11-16 19:59:42,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:42,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:42,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:42,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:42,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,377 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 19:59:42,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 320 treesize of output 305 [2022-11-16 19:59:42,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,412 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 19:59:42,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 316 treesize of output 309 [2022-11-16 19:59:42,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:42,446 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 19:59:42,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 394 treesize of output 387 [2022-11-16 19:59:42,583 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:42,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:42,602 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:42,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 19:59:42,786 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:42,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2022-11-16 19:59:42,820 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 19:59:42,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 140 [2022-11-16 19:59:43,398 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:43,405 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:43,409 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 19:59:49,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5671#(and (<= |ULTIMATE.start_sll_get_data_at_~index#1| 0) (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_~index#1|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_sll_get_data_at_~head#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_sll_get_data_at_#res#1| 2147483647) (<= 2 |ULTIMATE.start_main_~expected~0#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_get_data_at_#in~index#1|) (<= |ULTIMATE.start_sll_get_data_at_#in~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_sll_get_data_at_#res#1| 2147483648)))' at error location [2022-11-16 19:59:49,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 19:59:49,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 19:59:49,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 51 [2022-11-16 19:59:49,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105882019] [2022-11-16 19:59:49,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 19:59:49,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 19:59:49,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:49,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 19:59:49,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=3869, Unknown=35, NotChecked=0, Total=4160 [2022-11-16 19:59:49,745 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:52,625 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2022-11-16 19:59:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-16 19:59:52,626 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-11-16 19:59:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:52,626 INFO L225 Difference]: With dead ends: 48 [2022-11-16 19:59:52,626 INFO L226 Difference]: Without dead ends: 48 [2022-11-16 19:59:52,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=711, Invalid=7085, Unknown=36, NotChecked=0, Total=7832 [2022-11-16 19:59:52,628 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 238 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:52,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 406 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 925 Invalid, 0 Unknown, 140 Unchecked, 0.7s Time] [2022-11-16 19:59:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-16 19:59:52,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-11-16 19:59:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:52,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-11-16 19:59:52,630 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 32 [2022-11-16 19:59:52,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:52,631 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-11-16 19:59:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.803921568627451) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-11-16 19:59:52,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 19:59:52,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:52,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:52,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:52,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 19:59:52,838 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:52,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash -716343372, now seen corresponding path program 1 times [2022-11-16 19:59:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:52,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154387014] [2022-11-16 19:59:52,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:52,958 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:59:52,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:52,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154387014] [2022-11-16 19:59:52,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154387014] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:52,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:52,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 19:59:52,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636614055] [2022-11-16 19:59:52,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:52,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:59:52,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:52,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:59:52,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:52,961 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:53,070 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2022-11-16 19:59:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:59:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 19:59:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:53,071 INFO L225 Difference]: With dead ends: 53 [2022-11-16 19:59:53,071 INFO L226 Difference]: Without dead ends: 53 [2022-11-16 19:59:53,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:59:53,072 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 150 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:53,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 18 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-16 19:59:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2022-11-16 19:59:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-16 19:59:53,074 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 34 [2022-11-16 19:59:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:53,074 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-16 19:59:53,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-16 19:59:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 19:59:53,075 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:53,075 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:53,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 19:59:53,075 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:53,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -716344598, now seen corresponding path program 1 times [2022-11-16 19:59:53,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:53,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766924057] [2022-11-16 19:59:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 19:59:53,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766924057] [2022-11-16 19:59:53,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766924057] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:53,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652682344] [2022-11-16 19:59:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:53,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:53,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:53,179 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:53,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 19:59:53,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:53,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 19:59:53,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 19:59:53,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 19:59:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652682344] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:53,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 19:59:53,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-16 19:59:53,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347404682] [2022-11-16 19:59:53,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:53,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 19:59:53,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:53,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 19:59:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 19:59:53,453 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:53,545 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-16 19:59:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 19:59:53,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 19:59:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:53,546 INFO L225 Difference]: With dead ends: 51 [2022-11-16 19:59:53,546 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 19:59:53,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-16 19:59:53,546 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:53,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 25 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:53,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 19:59:53,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-11-16 19:59:53,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.175) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-16 19:59:53,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-11-16 19:59:53,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:53,549 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-16 19:59:53,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.75) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:53,549 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-16 19:59:53,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 19:59:53,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:53,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:53,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 19:59:53,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:53,759 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:53,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:53,759 INFO L85 PathProgramCache]: Analyzing trace with hash -716344597, now seen corresponding path program 1 times [2022-11-16 19:59:53,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:53,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071921810] [2022-11-16 19:59:53,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:53,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:53,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:59:53,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071921810] [2022-11-16 19:59:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071921810] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:53,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:53,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:59:53,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291833694] [2022-11-16 19:59:53,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:59:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:59:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:53,994 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:54,139 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2022-11-16 19:59:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:59:54,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-11-16 19:59:54,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:54,143 INFO L225 Difference]: With dead ends: 49 [2022-11-16 19:59:54,143 INFO L226 Difference]: Without dead ends: 49 [2022-11-16 19:59:54,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:59:54,145 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 123 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:54,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 9 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:54,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-16 19:59:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-11-16 19:59:54,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-11-16 19:59:54,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 34 [2022-11-16 19:59:54,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:54,148 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-11-16 19:59:54,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,148 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-11-16 19:59:54,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-16 19:59:54,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:54,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:54,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-16 19:59:54,149 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:54,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:54,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1212364125, now seen corresponding path program 1 times [2022-11-16 19:59:54,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:54,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359690107] [2022-11-16 19:59:54,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:54,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 19:59:54,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:54,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359690107] [2022-11-16 19:59:54,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359690107] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 19:59:54,284 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 19:59:54,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 19:59:54,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673146806] [2022-11-16 19:59:54,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 19:59:54,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 19:59:54,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 19:59:54,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 19:59:54,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 19:59:54,285 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 19:59:54,400 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2022-11-16 19:59:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 19:59:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-11-16 19:59:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 19:59:54,401 INFO L225 Difference]: With dead ends: 47 [2022-11-16 19:59:54,401 INFO L226 Difference]: Without dead ends: 47 [2022-11-16 19:59:54,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-16 19:59:54,402 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 19:59:54,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 12 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 19:59:54,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-16 19:59:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-16 19:59:54,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-11-16 19:59:54,404 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 36 [2022-11-16 19:59:54,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 19:59:54,404 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-11-16 19:59:54,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 19:59:54,404 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-11-16 19:59:54,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 19:59:54,405 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 19:59:54,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 19:59:54,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 19:59:54,405 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 19:59:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 19:59:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1159493043, now seen corresponding path program 1 times [2022-11-16 19:59:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 19:59:54,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143830511] [2022-11-16 19:59:54,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:54,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 19:59:54,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:55,806 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 19:59:55,807 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 19:59:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143830511] [2022-11-16 19:59:55,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143830511] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 19:59:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350779093] [2022-11-16 19:59:55,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 19:59:55,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 19:59:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 19:59:55,814 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 19:59:55,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 19:59:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 19:59:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-16 19:59:56,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 19:59:56,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:56,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:56,596 INFO L350 Elim1Store]: Elim1 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 54 treesize of output 41 [2022-11-16 19:59:56,796 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 19:59:56,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 54 [2022-11-16 19:59:56,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2022-11-16 19:59:57,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:57,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 56 [2022-11-16 19:59:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 19:59:57,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 19:59:58,617 WARN L833 $PredicateComparison]: unable to prove that (or (= (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) |c_ULTIMATE.start_main_old_#valid#1|) (forall ((v_ArrVal_2009 (Array Int Int)) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_98| Int) (v_ArrVal_2008 Int)) (or (not (= 0 (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_98| v_ArrVal_2008))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2009)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_98|)))) is different from false [2022-11-16 19:59:58,628 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:58,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 38 [2022-11-16 19:59:58,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:58,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:58,638 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:58,638 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 26 treesize of output 30 [2022-11-16 19:59:58,646 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 19:59:58,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2022-11-16 19:59:58,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-16 19:59:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 1 times theorem prover too weak. 8 trivial. 2 not checked. [2022-11-16 19:59:59,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350779093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 19:59:59,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925761719] [2022-11-16 19:59:59,255 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-16 19:59:59,255 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 19:59:59,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 19:59:59,255 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 19:59:59,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 19:59:59,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,279 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 19:59:59,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:59,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 19:59:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 19:59:59,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:59,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 19:59:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 19:59:59,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 19:59:59,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:59,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:59,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:59,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 19:59:59,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 19:59:59,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,517 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 19:59:59,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-16 19:59:59,554 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:59,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 19:59:59,592 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 19:59:59,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 19:59:59,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 19:59:59,935 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 19:59:59,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2022-11-16 19:59:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 19:59:59,999 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 19:59:59,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2022-11-16 20:00:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,058 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:00,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2022-11-16 20:00:00,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:00,619 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:00:00,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-16 20:00:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:00,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:00,653 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:00:00,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 20:00:00,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:00,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:00,685 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 20:00:00,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 353 treesize of output 346 [2022-11-16 20:00:00,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,813 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:00:00,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 366 treesize of output 369 [2022-11-16 20:00:00,958 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:00,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 20:00:00,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:00,982 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:00:00,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-16 20:00:01,019 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:01,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 20:00:01,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:01,369 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:01,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 969 [2022-11-16 20:00:01,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:01,424 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:01,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 962 treesize of output 957 [2022-11-16 20:00:01,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:01,485 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:00:01,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 937 treesize of output 886 [2022-11-16 20:00:01,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:01,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:01,986 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:00:01,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 307 treesize of output 300 [2022-11-16 20:00:02,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:02,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:02,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:02,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:02,016 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:00:02,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2022-11-16 20:00:02,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:02,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:02,050 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 20:00:02,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2022-11-16 20:00:02,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:02,199 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,212 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:02,320 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,328 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,626 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:02,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:02,864 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,871 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:02,873 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:08,956 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6647#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:00:08,956 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:00:08,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:00:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 18] total 57 [2022-11-16 20:00:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125356081] [2022-11-16 20:00:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:00:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-16 20:00:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-16 20:00:08,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=5082, Unknown=14, NotChecked=144, Total=5550 [2022-11-16 20:00:08,960 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:11,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:11,543 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-16 20:00:11,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 20:00:11,543 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-16 20:00:11,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:11,544 INFO L225 Difference]: With dead ends: 80 [2022-11-16 20:00:11,544 INFO L226 Difference]: Without dead ends: 80 [2022-11-16 20:00:11,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=609, Invalid=9274, Unknown=21, NotChecked=196, Total=10100 [2022-11-16 20:00:11,547 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:11,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 167 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 98 Unchecked, 0.0s Time] [2022-11-16 20:00:11,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-16 20:00:11,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 49. [2022-11-16 20:00:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-11-16 20:00:11,550 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 39 [2022-11-16 20:00:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:11,550 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-11-16 20:00:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.912280701754386) internal successors, (109), 57 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-11-16 20:00:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 20:00:11,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:11,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:11,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 20:00:11,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-16 20:00:11,757 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:00:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494269, now seen corresponding path program 1 times [2022-11-16 20:00:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:11,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182140027] [2022-11-16 20:00:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:11,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:00:12,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182140027] [2022-11-16 20:00:12,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182140027] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:12,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107252564] [2022-11-16 20:00:12,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:12,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:12,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:12,742 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:12,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 20:00:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:12,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 20:00:12,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:00:12,979 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:00:12,980 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:00:13,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:13,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:13,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 19 [2022-11-16 20:00:13,194 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 20:00:13,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-11-16 20:00:13,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:13,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-16 20:00:13,370 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 20:00:13,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 20:00:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:00:13,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:00:13,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:13,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-11-16 20:00:13,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-16 20:00:13,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2022-11-16 20:00:13,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-11-16 20:00:13,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:13,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:00:14,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107252564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:00:14,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [891251908] [2022-11-16 20:00:14,034 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:00:14,035 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:00:14,035 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:00:14,035 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:00:14,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,064 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:14,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:14,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:00:14,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:14,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:14,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:14,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:00:14,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:14,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:14,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:14,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:14,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:00:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:00:14,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,306 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:00:14,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 20:00:14,342 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:14,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:00:14,379 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:14,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:00:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,601 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:14,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 20:00:14,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:14,648 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:14,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 570 treesize of output 571 [2022-11-16 20:00:14,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:14,696 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:00:14,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 551 treesize of output 532 [2022-11-16 20:00:14,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,013 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:00:15,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 321 treesize of output 314 [2022-11-16 20:00:15,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,045 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:00:15,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 367 treesize of output 352 [2022-11-16 20:00:15,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,075 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 20:00:15,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 363 treesize of output 356 [2022-11-16 20:00:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,229 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:00:15,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 436 treesize of output 431 [2022-11-16 20:00:15,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,380 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:00:15,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 20:00:15,417 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:15,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:00:15,455 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:15,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:00:15,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,603 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:15,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 20:00:15,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:15,649 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:15,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 312 treesize of output 313 [2022-11-16 20:00:15,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,698 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:00:15,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 293 treesize of output 294 [2022-11-16 20:00:15,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,969 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:00:15,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 329 treesize of output 322 [2022-11-16 20:00:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:15,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:16,008 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 20:00:16,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 377 treesize of output 370 [2022-11-16 20:00:16,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:16,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:16,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:16,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:16,035 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:00:16,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 471 treesize of output 456 [2022-11-16 20:00:16,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:16,183 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,193 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:16,295 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,303 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,650 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:16,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:16,892 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,898 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:16,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:21,207 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7112#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 20:00:21,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:00:21,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:00:21,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 15] total 33 [2022-11-16 20:00:21,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670368464] [2022-11-16 20:00:21,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:00:21,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 20:00:21,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:21,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 20:00:21,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2022-11-16 20:00:21,210 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 34 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:22,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:22,293 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2022-11-16 20:00:22,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 20:00:22,294 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-16 20:00:22,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:22,294 INFO L225 Difference]: With dead ends: 55 [2022-11-16 20:00:22,294 INFO L226 Difference]: Without dead ends: 55 [2022-11-16 20:00:22,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=448, Invalid=3842, Unknown=0, NotChecked=0, Total=4290 [2022-11-16 20:00:22,295 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 213 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:22,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 89 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 578 Invalid, 0 Unknown, 91 Unchecked, 0.4s Time] [2022-11-16 20:00:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-16 20:00:22,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-11-16 20:00:22,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-11-16 20:00:22,298 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2022-11-16 20:00:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:22,298 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-11-16 20:00:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.3636363636363638) internal successors, (78), 34 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-11-16 20:00:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 20:00:22,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:22,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:22,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 20:00:22,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:22,505 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:00:22,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1159494268, now seen corresponding path program 1 times [2022-11-16 20:00:22,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:22,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379113145] [2022-11-16 20:00:22,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:22,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:24,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:00:24,840 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379113145] [2022-11-16 20:00:24,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379113145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:24,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004664313] [2022-11-16 20:00:24,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:24,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:24,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:24,842 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:24,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 20:00:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:25,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-16 20:00:25,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:00:25,186 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:00:25,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:00:25,196 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 16 [2022-11-16 20:00:25,308 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:25,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:25,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-16 20:00:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:25,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:00:25,703 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 20:00:25,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2022-11-16 20:00:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:25,711 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 20:00:25,955 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:25,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 21 [2022-11-16 20:00:25,964 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:25,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-11-16 20:00:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 20:00:26,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:00:26,453 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))) (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4)))) is different from false [2022-11-16 20:00:26,486 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)))) (and (forall ((v_ArrVal_2239 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int))) (<= (+ 8 (select (select (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) is different from false [2022-11-16 20:00:26,665 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2235)))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~s~0#1.base|) .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2236)) .cse1 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse0 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2236)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store .cse4 |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2235)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse3) v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))) is different from false [2022-11-16 20:00:26,696 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse2 (store .cse4 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse1 (select .cse2 .cse3))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse1 v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse2) .cse1 v_ArrVal_2238) |c_ULTIMATE.start_main_~s~0#1.base|) 4)))))))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|) (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse4 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse3) v_ArrVal_2239) |c_ULTIMATE.start_main_~s~0#1.base|) 4) 4))))))) is different from false [2022-11-16 20:00:26,721 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base|)) (.cse2 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) (.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (<= 0 (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) (select (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235) .cse2) v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 4))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))) (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_114| Int)) (or (forall ((v_ArrVal_2239 (Array Int Int)) (v_ArrVal_2238 (Array Int Int)) (v_ArrVal_2236 Int) (v_ArrVal_2235 Int)) (let ((.cse4 (store .cse1 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2235))) (let ((.cse3 (select .cse4 .cse2))) (<= (+ (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~head~0#1.base| (store .cse0 |v_ULTIMATE.start_sll_update_at_~head#1.offset_114| v_ArrVal_2236)) .cse3 v_ArrVal_2239) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) 8) (select |c_#length| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse4) .cse3 v_ArrVal_2238) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4)))))) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_114|))))) is different from false [2022-11-16 20:00:26,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,739 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,739 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 81 [2022-11-16 20:00:26,746 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 60 [2022-11-16 20:00:26,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,757 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 36 treesize of output 40 [2022-11-16 20:00:26,766 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2022-11-16 20:00:26,775 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 78 [2022-11-16 20:00:26,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-16 20:00:26,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-16 20:00:26,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,827 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:26,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 45 [2022-11-16 20:00:26,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2022-11-16 20:00:26,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:26,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:26,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 10 [2022-11-16 20:00:35,127 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 27 DAG size of output: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:00:35,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2022-11-16 20:00:35,163 INFO L321 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2022-11-16 20:00:35,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 59 [2022-11-16 20:00:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 7 not checked. [2022-11-16 20:00:35,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004664313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:00:35,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604240524] [2022-11-16 20:00:35,274 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:00:35,274 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:00:35,275 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:00:35,275 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:00:35,275 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:35,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,299 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:35,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:35,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:35,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:00:35,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:00:35,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:35,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:35,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:35,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:35,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:35,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:35,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:00:35,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:00:35,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:35,588 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 20:00:35,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 20:00:35,631 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:35,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 20:00:35,668 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:35,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 20:00:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:36,199 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:36,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1014 treesize of output 1003 [2022-11-16 20:00:36,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:36,276 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 20:00:36,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 983 treesize of output 940 [2022-11-16 20:00:36,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:36,347 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:36,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 984 treesize of output 979 [2022-11-16 20:00:36,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:36,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:36,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:36,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:36,995 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:00:36,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2022-11-16 20:00:37,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:37,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:37,034 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:00:37,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 20:00:37,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:37,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:37,076 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 20:00:37,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-11-16 20:00:37,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:37,242 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:00:37,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-16 20:00:37,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:37,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:37,466 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 20:00:37,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 289 [2022-11-16 20:00:37,513 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:37,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 287 treesize of output 294 [2022-11-16 20:00:37,556 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:37,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 281 treesize of output 288 [2022-11-16 20:00:37,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:37,817 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:37,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 597 treesize of output 592 [2022-11-16 20:00:37,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:37,881 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 20:00:37,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 572 treesize of output 561 [2022-11-16 20:00:37,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:37,937 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:37,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 581 treesize of output 576 [2022-11-16 20:00:38,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,335 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:00:38,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 334 treesize of output 327 [2022-11-16 20:00:38,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,378 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 20:00:38,378 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 424 treesize of output 417 [2022-11-16 20:00:38,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:38,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:38,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:38,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:38,412 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:00:38,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 488 treesize of output 473 [2022-11-16 20:00:38,566 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:38,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:38,590 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:38,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:00:38,711 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:38,721 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:39,080 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:39,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:39,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:00:39,332 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:39,340 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:39,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:00:44,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7549#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (or (not (<= (+ 8 |ULTIMATE.start_sll_destroy_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_destroy_~head#1.base|))) (not (<= 0 (+ |ULTIMATE.start_sll_destroy_~head#1.offset| 4)))) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 20:00:44,553 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:00:44,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:00:44,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17, 17] total 55 [2022-11-16 20:00:44,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827389883] [2022-11-16 20:00:44,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:00:44,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 20:00:44,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:00:44,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 20:00:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=4253, Unknown=35, NotChecked=680, Total=5256 [2022-11-16 20:00:44,555 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:00:55,846 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2022-11-16 20:00:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 20:00:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-11-16 20:00:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:00:55,847 INFO L225 Difference]: With dead ends: 51 [2022-11-16 20:00:55,847 INFO L226 Difference]: Without dead ends: 51 [2022-11-16 20:00:55,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=629, Invalid=7187, Unknown=36, NotChecked=890, Total=8742 [2022-11-16 20:00:55,849 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 188 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 284 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 20:00:55,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 97 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 869 Invalid, 0 Unknown, 284 Unchecked, 0.8s Time] [2022-11-16 20:00:55,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-16 20:00:55,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-16 20:00:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:55,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-11-16 20:00:55,852 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 39 [2022-11-16 20:00:55,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:00:55,852 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-11-16 20:00:55,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.0) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:00:55,852 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-11-16 20:00:55,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 20:00:55,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:00:55,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:00:55,859 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-16 20:00:56,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-16 20:00:56,055 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:00:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:00:56,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1877435652, now seen corresponding path program 1 times [2022-11-16 20:00:56,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:00:56,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039136037] [2022-11-16 20:00:56,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:56,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:00:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:00:57,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:00:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039136037] [2022-11-16 20:00:57,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039136037] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:00:57,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159692367] [2022-11-16 20:00:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:00:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:00:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:00:57,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:00:57,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 20:00:57,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:00:57,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-16 20:00:57,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:00:57,597 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:00:57,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:00:57,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:57,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:57,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2022-11-16 20:00:58,101 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 20:00:58,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-16 20:00:58,288 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:58,288 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 19 [2022-11-16 20:00:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:00:58,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:00:58,794 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2350 (Array Int Int))) (< (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_2350) |c_ULTIMATE.start_main_~s~0#1.base|) 4) |c_#StackHeapBarrier|)) is different from false [2022-11-16 20:00:59,173 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_sll_update_at_~head#1.offset_122| Int) (v_ArrVal_2349 Int) (v_ArrVal_2350 (Array Int Int))) (or (< (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_122| v_ArrVal_2349))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) v_ArrVal_2350)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) 4) |c_#StackHeapBarrier|) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_122|))) is different from false [2022-11-16 20:00:59,186 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:59,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 37 [2022-11-16 20:00:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:59,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:59,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:59,198 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 25 treesize of output 29 [2022-11-16 20:00:59,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:00:59,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 30 [2022-11-16 20:00:59,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-16 20:00:59,338 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 20:00:59,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:00:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 3 not checked. [2022-11-16 20:00:59,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159692367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:00:59,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [585437894] [2022-11-16 20:00:59,350 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:00:59,350 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:00:59,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:00:59,351 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:00:59,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:00:59,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,378 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:00:59,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:00:59,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:59,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:00:59,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:00:59,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:59,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:00:59,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:59,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:00:59,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:00:59,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:00:59,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:00:59,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,657 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:00:59,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 20:00:59,715 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:59,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:00:59,780 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:00:59,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:00:59,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:00:59,973 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:00:59,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 20:00:59,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,040 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:01:00,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2022-11-16 20:01:00,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,103 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:00,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-16 20:01:00,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,420 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:01:00,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 290 [2022-11-16 20:01:00,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,460 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:01:00,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 301 treesize of output 294 [2022-11-16 20:01:00,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:00,498 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:01:00,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 313 treesize of output 306 [2022-11-16 20:01:00,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,653 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:01:00,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 380 treesize of output 383 [2022-11-16 20:01:00,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:00,797 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:01:00,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 279 [2022-11-16 20:01:00,843 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:00,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:01:00,892 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:00,892 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:01:01,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:01,069 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:01,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 318 treesize of output 319 [2022-11-16 20:01:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,123 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:01:01,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 299 treesize of output 300 [2022-11-16 20:01:01,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:01,185 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:01,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 308 treesize of output 309 [2022-11-16 20:01:01,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,508 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:01:01,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 316 treesize of output 309 [2022-11-16 20:01:01,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,552 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 20:01:01,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 358 treesize of output 351 [2022-11-16 20:01:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:01,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:01,583 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:01:01,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 425 [2022-11-16 20:01:01,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:01:01,722 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:01,739 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:01,834 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:01,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:01:01,853 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:02,153 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:02,208 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:01:02,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:01:02,376 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:02,384 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:02,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:01:08,218 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7991#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (not (< |ULTIMATE.start_sll_destroy_~head#1.base| |#StackHeapBarrier|)) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:01:08,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:01:08,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:01:08,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 17] total 38 [2022-11-16 20:01:08,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610645187] [2022-11-16 20:01:08,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:01:08,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 20:01:08,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:01:08,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 20:01:08,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2609, Unknown=50, NotChecked=210, Total=3080 [2022-11-16 20:01:08,221 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:01:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:01:10,294 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2022-11-16 20:01:10,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-16 20:01:10,294 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-11-16 20:01:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:01:10,295 INFO L225 Difference]: With dead ends: 52 [2022-11-16 20:01:10,295 INFO L226 Difference]: Without dead ends: 52 [2022-11-16 20:01:10,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 84 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=419, Invalid=4369, Unknown=50, NotChecked=274, Total=5112 [2022-11-16 20:01:10,296 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 154 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:01:10,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 153 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 612 Invalid, 0 Unknown, 208 Unchecked, 0.6s Time] [2022-11-16 20:01:10,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-16 20:01:10,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-11-16 20:01:10,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.127659574468085) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:01:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-11-16 20:01:10,299 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 41 [2022-11-16 20:01:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:01:10,299 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-11-16 20:01:10,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 39 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:01:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-11-16 20:01:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:01:10,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:01:10,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:01:10,307 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-11-16 20:01:10,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-11-16 20:01:10,501 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:01:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:01:10,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1621217452, now seen corresponding path program 2 times [2022-11-16 20:01:10,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:01:10,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857855743] [2022-11-16 20:01:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:01:10,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:01:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:01:12,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 20:01:12,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:01:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857855743] [2022-11-16 20:01:12,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857855743] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:01:12,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809229409] [2022-11-16 20:01:12,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:01:12,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:01:12,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:01:12,992 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:01:12,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 20:01:13,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:01:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:01:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-16 20:01:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:01:13,652 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:14,023 INFO L350 Elim1Store]: Elim1 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 52 treesize of output 39 [2022-11-16 20:01:14,343 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 20:01:14,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 52 [2022-11-16 20:01:14,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 26 [2022-11-16 20:01:14,925 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_sll_destroy_~head#1.base_41| Int) (|v_ULTIMATE.start_sll_destroy_~head#1.base_42| Int)) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_sll_destroy_~head#1.base_42| 1))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_sll_destroy_~head#1.base_42|) 0) (= (select .cse0 |v_ULTIMATE.start_sll_destroy_~head#1.base_41|) 0) (= |c_#valid| (store (store .cse0 |v_ULTIMATE.start_sll_destroy_~head#1.base_41| 0) |v_ULTIMATE.start_sll_destroy_~head#1.base_42| 0))))) is different from true [2022-11-16 20:01:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 2 not checked. [2022-11-16 20:01:14,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:01:15,214 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-16 20:01:15,225 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_sll_update_at_~head#1.offset| 4)) v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) 0))) is different from false [2022-11-16 20:01:15,235 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) v_ArrVal_2465) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-16 20:01:15,243 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (v_ArrVal_2465 (Array Int Int))) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_update_at_~head#1.base|) |c_ULTIMATE.start_sll_update_at_~head#1.offset| v_ArrVal_2463)))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2022-11-16 20:01:15,260 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~s~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|) (= (store (store |c_#valid| |c_ULTIMATE.start_main_~s~0#1.base| 0) (let ((.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1)) 0) |c_ULTIMATE.start_main_old_#valid#1|))) is different from false [2022-11-16 20:01:15,273 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2463 Int) (|v_ULTIMATE.start_sll_update_at_~head#1.offset_130| Int) (v_ArrVal_2465 (Array Int Int))) (or (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |c_ULTIMATE.start_sll_create_~head~0#1.base| 0) (let ((.cse1 (+ 4 |c_ULTIMATE.start_sll_create_~head~0#1.offset|))) (select (select (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base|) |v_ULTIMATE.start_sll_update_at_~head#1.offset_130| v_ArrVal_2463))) (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~head~0#1.base| .cse0) (select .cse0 .cse1) v_ArrVal_2465)) |c_ULTIMATE.start_sll_create_~head~0#1.base|) .cse1)) 0)) (< |c_ULTIMATE.start_sll_create_~head~0#1.offset| |v_ULTIMATE.start_sll_update_at_~head#1.offset_130|))) is different from false [2022-11-16 20:01:15,285 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:01:15,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 49 [2022-11-16 20:01:15,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:15,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:15,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:01:15,297 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 37 treesize of output 41 [2022-11-16 20:01:15,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2022-11-16 20:01:15,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-11-16 20:01:35,530 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 25 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-16 20:01:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 9 not checked. [2022-11-16 20:01:50,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809229409] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:01:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271659230] [2022-11-16 20:01:50,812 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-16 20:01:50,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:01:50,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:01:50,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:01:50,814 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:01:50,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,845 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:50,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:01:50,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:01:50,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:01:50,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:01:50,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:01:50,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:50,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:01:50,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:50,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:01:51,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:51,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:01:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:01:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:01:51,189 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:51,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 20:01:51,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:51,271 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 20:01:51,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-16 20:01:51,333 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:51,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 20:01:51,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:51,944 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 20:01:51,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 973 treesize of output 930 [2022-11-16 20:01:51,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,039 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:52,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 974 treesize of output 963 [2022-11-16 20:01:52,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,123 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:52,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 956 treesize of output 951 [2022-11-16 20:01:52,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:52,620 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:01:52,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 301 treesize of output 286 [2022-11-16 20:01:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:52,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:52,676 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:01:52,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 20:01:52,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:52,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:52,717 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 20:01:52,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-11-16 20:01:52,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:52,865 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:01:52,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 370 treesize of output 373 [2022-11-16 20:01:53,062 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:53,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 20:01:53,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:53,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:53,141 INFO L321 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2022-11-16 20:01:53,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 284 treesize of output 276 [2022-11-16 20:01:53,202 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:01:53,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 274 treesize of output 281 [2022-11-16 20:01:53,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:53,834 INFO L321 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2022-11-16 20:01:53,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 971 treesize of output 924 [2022-11-16 20:01:53,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:53,940 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:53,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 968 treesize of output 963 [2022-11-16 20:01:53,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:54,026 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:01:54,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 956 treesize of output 951 [2022-11-16 20:01:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:54,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:54,655 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:01:54,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 20:01:54,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:54,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:54,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:01:54,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:54,693 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:01:54,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 309 treesize of output 294 [2022-11-16 20:01:54,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:54,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:01:54,734 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:01:54,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 305 treesize of output 298 [2022-11-16 20:01:54,882 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:54,892 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:54,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:01:54,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:01:54,992 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:55,003 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:55,343 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:55,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:01:55,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:01:55,612 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:55,620 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:01:55,624 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:03,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8462#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:02:03,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:03,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:02:03,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 17] total 54 [2022-11-16 20:02:03,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017005966] [2022-11-16 20:02:03,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:03,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-16 20:02:03,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:03,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-16 20:02:03,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=4267, Unknown=13, NotChecked=966, Total=5550 [2022-11-16 20:02:03,773 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:02:08,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:08,099 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2022-11-16 20:02:08,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 20:02:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-16 20:02:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:08,101 INFO L225 Difference]: With dead ends: 89 [2022-11-16 20:02:08,101 INFO L226 Difference]: Without dead ends: 88 [2022-11-16 20:02:08,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 7 IntricatePredicates, 4 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 49.8s TimeCoverageRelationStatistics Valid=443, Invalid=6378, Unknown=13, NotChecked=1176, Total=8010 [2022-11-16 20:02:08,102 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:08,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 200 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 199 Unchecked, 0.3s Time] [2022-11-16 20:02:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-16 20:02:08,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-11-16 20:02:08,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:02:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-11-16 20:02:08,106 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 44 [2022-11-16 20:02:08,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:08,106 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-11-16 20:02:08,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1636363636363636) internal successors, (119), 55 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:02:08,107 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-11-16 20:02:08,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 20:02:08,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:08,108 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:02:08,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:08,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:08,320 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:02:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1621218678, now seen corresponding path program 2 times [2022-11-16 20:02:08,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:08,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065061047] [2022-11-16 20:02:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:08,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-16 20:02:10,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065061047] [2022-11-16 20:02:10,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065061047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:02:10,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115221693] [2022-11-16 20:02:10,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 20:02:10,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:10,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:10,583 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:10,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 20:02:10,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 20:02:10,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:10,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-16 20:02:10,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:10,934 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:10,946 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:11,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:02:11,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:02:11,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:11,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 20:02:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:11,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-11-16 20:02:11,168 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:02:11,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:02:11,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:02:11,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:02:11,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:02:11,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-16 20:02:11,359 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:11,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-16 20:02:11,542 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:11,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-11-16 20:02:11,553 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-16 20:02:11,792 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:11,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 58 [2022-11-16 20:02:11,812 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-16 20:02:11,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-11-16 20:02:12,175 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:12,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:12,328 INFO L321 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2022-11-16 20:02:12,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 46 [2022-11-16 20:02:12,340 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:12,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 18 [2022-11-16 20:02:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:02:12,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:12,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-16 20:02:30,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:30,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 73 [2022-11-16 20:02:30,261 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:30,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 60 [2022-11-16 20:02:30,271 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:30,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-11-16 20:02:31,013 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:31,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 310 treesize of output 328 [2022-11-16 20:02:31,731 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| 4))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.base|)))) (and (forall ((v_prenex_6 Int)) (or (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| v_prenex_6) (forall ((v_prenex_7 Int) (v_arrayElimArr_8 (Array Int Int)) (v_prenex_8 Int)) (let ((.cse0 (+ v_prenex_8 4))) (or (not (<= 0 v_prenex_8)) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (select v_arrayElimArr_8 .cse0))) (= (select (let ((.cse1 (let ((.cse2 (store .cse3 v_prenex_6 v_arrayElimArr_8))) (store .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select .cse2 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| v_prenex_7))))) (select .cse1 (select (select .cse1 v_prenex_6) .cse0))) 4) 0) (not (<= v_prenex_8 0))))))) (forall ((v_arrayElimArr_10 (Array Int Int)) (|v_ULTIMATE.start_node_create_~temp~0#1.base_77| Int) (v_ArrVal_2601 Int) (v_arrayElimArr_9 (Array Int Int)) (v_ArrVal_2602 Int) (|v_ULTIMATE.start_node_create_~temp~0#1.offset_94| Int)) (let ((.cse7 (+ |v_ULTIMATE.start_node_create_~temp~0#1.offset_94| 4))) (or (not (<= |v_ULTIMATE.start_node_create_~temp~0#1.offset_94| 0)) (= 0 (select (select (let ((.cse4 (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) .cse5 |c_ULTIMATE.start_sll_create_~head~0#1.offset|)) |v_ULTIMATE.start_node_create_~temp~0#1.base_77| v_arrayElimArr_9))) (store .cse4 |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select .cse4 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| v_ArrVal_2602))) (select (select (let ((.cse6 (store .cse3 |v_ULTIMATE.start_node_create_~temp~0#1.base_77| v_arrayElimArr_10))) (store .cse6 |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (store (select .cse6 |c_ULTIMATE.start_sll_create_~new_head~0#1.base|) |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| v_ArrVal_2601))) |v_ULTIMATE.start_node_create_~temp~0#1.base_77|) .cse7)) 4)) (not (<= 0 |v_ULTIMATE.start_node_create_~temp~0#1.offset_94|)) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.offset| (select v_arrayElimArr_9 .cse7))) (not (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| (select v_arrayElimArr_10 .cse7))) (= |c_ULTIMATE.start_sll_create_~new_head~0#1.base| |v_ULTIMATE.start_node_create_~temp~0#1.base_77|))))))) is different from false [2022-11-16 20:02:32,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:32,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 136 [2022-11-16 20:02:32,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,401 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:32,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 84 [2022-11-16 20:02:32,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,421 INFO L321 Elim1Store]: treesize reduction 36, result has 10.0 percent of original size [2022-11-16 20:02:32,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 252 [2022-11-16 20:02:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 38 [2022-11-16 20:02:32,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-16 20:02:32,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:32,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:02:32,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,475 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:32,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 161 treesize of output 84 [2022-11-16 20:02:32,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 42 [2022-11-16 20:02:32,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 8 [2022-11-16 20:02:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2022-11-16 20:02:32,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115221693] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:32,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [497208359] [2022-11-16 20:02:32,510 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2022-11-16 20:02:32,511 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:32,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:32,511 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:32,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,546 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:32,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:02:32,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:02:32,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:02:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:02:32,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:02:32,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:02:32,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:02:32,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:32,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:02:32,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:02:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:02:32,885 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:32,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:02:32,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:32,919 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:32,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 20:02:32,977 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:32,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:02:33,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:33,317 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:33,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 735 treesize of output 730 [2022-11-16 20:02:33,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,397 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 710 treesize of output 679 [2022-11-16 20:02:33,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:33,486 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:33,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 711 treesize of output 712 [2022-11-16 20:02:33,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:33,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:33,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,916 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-16 20:02:33,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 297 treesize of output 282 [2022-11-16 20:02:33,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,954 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:02:33,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 293 treesize of output 286 [2022-11-16 20:02:33,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:33,993 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 20:02:33,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 359 treesize of output 352 [2022-11-16 20:02:34,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:34,186 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:02:34,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 360 treesize of output 363 [2022-11-16 20:02:34,395 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:34,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 298 [2022-11-16 20:02:34,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:34,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:34,431 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:34,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 291 treesize of output 273 [2022-11-16 20:02:34,494 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:34,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 285 treesize of output 292 [2022-11-16 20:02:34,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:34,744 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:34,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 576 treesize of output 577 [2022-11-16 20:02:34,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:34,811 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:34,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 557 treesize of output 538 [2022-11-16 20:02:34,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:34,874 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:34,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 562 treesize of output 563 [2022-11-16 20:02:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:35,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:35,215 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:02:35,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 321 treesize of output 314 [2022-11-16 20:02:35,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:35,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:35,257 INFO L321 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2022-11-16 20:02:35,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 363 treesize of output 356 [2022-11-16 20:02:35,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:35,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:35,290 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:02:35,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 451 treesize of output 436 [2022-11-16 20:02:35,452 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:35,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:02:35,487 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:35,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:02:35,703 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 20:02:35,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2022-11-16 20:02:35,758 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 20:02:35,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 140 [2022-11-16 20:02:36,480 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:36,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:02:36,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:02:36,829 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:36,838 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:36,842 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:02:45,364 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8995#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_destroy_~head#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-16 20:02:45,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:02:45,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:02:45,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 20] total 43 [2022-11-16 20:02:45,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386304678] [2022-11-16 20:02:45,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:02:45,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-16 20:02:45,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:02:45,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-16 20:02:45,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3276, Unknown=43, NotChecked=116, Total=3660 [2022-11-16 20:02:45,367 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 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) [2022-11-16 20:02:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:02:47,998 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2022-11-16 20:02:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-16 20:02:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 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) Word has length 44 [2022-11-16 20:02:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:02:47,999 INFO L225 Difference]: With dead ends: 90 [2022-11-16 20:02:47,999 INFO L226 Difference]: Without dead ends: 59 [2022-11-16 20:02:48,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 83 SyntacticMatches, 15 SemanticMatches, 74 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=368, Invalid=5130, Unknown=56, NotChecked=146, Total=5700 [2022-11-16 20:02:48,000 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 60 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 20:02:48,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 232 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 594 Invalid, 0 Unknown, 232 Unchecked, 0.7s Time] [2022-11-16 20:02:48,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-11-16 20:02:48,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-11-16 20:02:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:02:48,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-11-16 20:02:48,002 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 44 [2022-11-16 20:02:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:02:48,002 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-11-16 20:02:48,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.25) internal successors, (99), 43 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) [2022-11-16 20:02:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-11-16 20:02:48,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 20:02:48,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:02:48,003 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:02:48,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 20:02:48,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-16 20:02:48,203 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-11-16 20:02:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:02:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1373563767, now seen corresponding path program 3 times [2022-11-16 20:02:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:02:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870266046] [2022-11-16 20:02:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:02:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:02:48,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:02:48,366 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-16 20:02:48,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:02:48,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870266046] [2022-11-16 20:02:48,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870266046] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:02:48,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080500384] [2022-11-16 20:02:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 20:02:48,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:02:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:02:48,368 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:02:48,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 20:02:48,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 20:02:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 20:02:48,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-16 20:02:48,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:02:48,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:02:48,879 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 20:02:48,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 20:02:48,948 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 19 [2022-11-16 20:02:48,967 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 19 [2022-11-16 20:02:49,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-16 20:02:49,027 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:49,241 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:49,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2022-11-16 20:02:49,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 20:02:49,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 20:02:49,447 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:49,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 33 [2022-11-16 20:02:49,877 INFO L321 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-11-16 20:02:49,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 23 [2022-11-16 20:02:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 20:02:49,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:02:53,535 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:53,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 55 [2022-11-16 20:02:53,894 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:53,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 51 [2022-11-16 20:02:53,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:53,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 167 [2022-11-16 20:02:53,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 20:02:53,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 211 treesize of output 203 [2022-11-16 20:02:53,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 197 treesize of output 163 [2022-11-16 20:02:53,944 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-16 20:02:53,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-16 20:02:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 7 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 20:02:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080500384] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:02:53,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1415770585] [2022-11-16 20:02:53,994 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-16 20:02:53,994 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:02:53,994 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:02:53,995 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:02:53,995 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:02:54,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,021 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:54,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-16 20:02:54,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:02:54,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 20:02:54,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:02:54,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-16 20:02:54,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 20:02:54,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:54,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:02:54,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:54,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2022-11-16 20:02:54,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2022-11-16 20:02:54,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 35 [2022-11-16 20:02:54,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,293 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:54,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 290 treesize of output 272 [2022-11-16 20:02:54,345 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:54,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 20:02:54,392 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:54,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 20:02:54,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:54,760 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:54,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 961 treesize of output 910 [2022-11-16 20:02:54,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,836 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:54,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 958 treesize of output 953 [2022-11-16 20:02:54,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:54,900 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:54,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 946 treesize of output 941 [2022-11-16 20:02:55,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:55,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:55,425 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-16 20:02:55,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 307 treesize of output 300 [2022-11-16 20:02:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:55,463 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:02:55,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 383 treesize of output 368 [2022-11-16 20:02:55,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:55,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:55,508 INFO L321 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2022-11-16 20:02:55,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 372 [2022-11-16 20:02:55,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,688 INFO L321 Elim1Store]: treesize reduction 118, result has 15.7 percent of original size [2022-11-16 20:02:55,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 398 treesize of output 401 [2022-11-16 20:02:55,887 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:55,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 291 [2022-11-16 20:02:55,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:55,915 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-16 20:02:55,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 284 treesize of output 266 [2022-11-16 20:02:55,962 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 20:02:55,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 285 [2022-11-16 20:02:56,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:56,292 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:56,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 714 treesize of output 709 [2022-11-16 20:02:56,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,365 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-16 20:02:56,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 689 treesize of output 658 [2022-11-16 20:02:56,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:56,445 INFO L321 Elim1Store]: treesize reduction 37, result has 33.9 percent of original size [2022-11-16 20:02:56,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 690 treesize of output 691 [2022-11-16 20:02:56,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,782 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-16 20:02:56,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 297 treesize of output 290 [2022-11-16 20:02:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:56,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 20:02:56,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,815 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-16 20:02:56,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 373 treesize of output 358 [2022-11-16 20:02:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-16 20:02:56,850 INFO L321 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2022-11-16 20:02:56,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 369 treesize of output 362 [2022-11-16 20:02:56,988 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:57,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:02:57,013 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:57,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 20:02:57,275 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 20:02:57,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 146 [2022-11-16 20:02:57,337 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-16 20:02:57,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 142 treesize of output 140 [2022-11-16 20:02:57,860 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:57,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:02:57,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-16 20:02:58,110 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:58,117 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 20:02:58,121 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:03:06,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9520#(and (<= 0 |ULTIMATE.start_main_~s~0#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_destroy_#in~head#1.offset| 0) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 2 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= 0 |ULTIMATE.start_sll_destroy_#in~head#1.offset|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_destroy_~head#1.base| 0) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= |ULTIMATE.start_main_~s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_destroy_~head#1.offset| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-16 20:03:06,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:03:06,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:03:06,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 23, 24] total 40 [2022-11-16 20:03:06,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457946791] [2022-11-16 20:03:06,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:03:06,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 20:03:06,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:03:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 20:03:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3050, Unknown=25, NotChecked=0, Total=3306 [2022-11-16 20:03:06,604 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:03:07,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:03:07,117 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-11-16 20:03:07,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 20:03:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-11-16 20:03:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:03:07,117 INFO L225 Difference]: With dead ends: 12 [2022-11-16 20:03:07,117 INFO L226 Difference]: Without dead ends: 0 [2022-11-16 20:03:07,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=281, Invalid=3723, Unknown=28, NotChecked=0, Total=4032 [2022-11-16 20:03:07,118 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:03:07,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-11-16 20:03:07,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-16 20:03:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-16 20:03:07,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:03:07,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-16 20:03:07,120 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2022-11-16 20:03:07,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:03:07,120 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 20:03:07,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.775) internal successors, (111), 40 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:03:07,120 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-16 20:03:07,121 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-16 20:03:07,123 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2022-11-16 20:03:07,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2022-11-16 20:03:07,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2022-11-16 20:03:07,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2022-11-16 20:03:07,124 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 21 remaining) [2022-11-16 20:03:07,125 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK (1 of 21 remaining) [2022-11-16 20:03:07,126 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2022-11-16 20:03:07,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 20:03:07,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 20:03:07,330 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:03:07,332 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 20:03:07,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:03:07 BoogieIcfgContainer [2022-11-16 20:03:07,335 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 20:03:07,335 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 20:03:07,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 20:03:07,336 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 20:03:07,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 07:57:38" (3/4) ... [2022-11-16 20:03:07,339 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-16 20:03:07,350 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 31 nodes and edges [2022-11-16 20:03:07,350 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2022-11-16 20:03:07,351 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-16 20:03:07,351 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-16 20:03:07,410 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 20:03:07,412 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 20:03:07,412 INFO L158 Benchmark]: Toolchain (without parser) took 330071.64ms. Allocated memory was 130.0MB in the beginning and 446.7MB in the end (delta: 316.7MB). Free memory was 88.7MB in the beginning and 227.4MB in the end (delta: -138.8MB). Peak memory consumption was 177.4MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,412 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 130.0MB. Free memory is still 106.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:03:07,414 INFO L158 Benchmark]: CACSL2BoogieTranslator took 523.13ms. Allocated memory is still 130.0MB. Free memory was 88.6MB in the beginning and 97.0MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,414 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.05ms. Allocated memory is still 130.0MB. Free memory was 97.0MB in the beginning and 94.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,414 INFO L158 Benchmark]: Boogie Preprocessor took 36.11ms. Allocated memory is still 130.0MB. Free memory was 94.9MB in the beginning and 92.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,414 INFO L158 Benchmark]: RCFGBuilder took 614.55ms. Allocated memory is still 130.0MB. Free memory was 92.8MB in the beginning and 71.3MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,415 INFO L158 Benchmark]: TraceAbstraction took 328758.35ms. Allocated memory was 130.0MB in the beginning and 446.7MB in the end (delta: 316.7MB). Free memory was 70.4MB in the beginning and 230.6MB in the end (delta: -160.2MB). Peak memory consumption was 158.5MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,415 INFO L158 Benchmark]: Witness Printer took 76.47ms. Allocated memory is still 446.7MB. Free memory was 230.6MB in the beginning and 227.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-16 20:03:07,415 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 130.0MB. Free memory is still 106.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 523.13ms. Allocated memory is still 130.0MB. Free memory was 88.6MB in the beginning and 97.0MB in the end (delta: -8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.05ms. Allocated memory is still 130.0MB. Free memory was 97.0MB in the beginning and 94.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.11ms. Allocated memory is still 130.0MB. Free memory was 94.9MB in the beginning and 92.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 614.55ms. Allocated memory is still 130.0MB. Free memory was 92.8MB in the beginning and 71.3MB in the end (delta: 21.6MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 328758.35ms. Allocated memory was 130.0MB in the beginning and 446.7MB in the end (delta: 316.7MB). Free memory was 70.4MB in the beginning and 230.6MB in the end (delta: -160.2MB). Peak memory consumption was 158.5MB. Max. memory is 16.1GB. * Witness Printer took 76.47ms. Allocated memory is still 446.7MB. Free memory was 230.6MB in the beginning and 227.4MB in the end (delta: 3.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 630]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 613]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 328.7s, OverallIterations: 35, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 38.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6624 SdHoareTripleChecker+Valid, 8.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6624 mSDsluCounter, 3580 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1785 IncrementalHoareTripleChecker+Unchecked, 2982 mSDsCounter, 325 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8758 IncrementalHoareTripleChecker+Invalid, 10868 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 325 mSolverCounterUnsat, 598 mSDtfsCounter, 8758 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2511 GetRequests, 1258 SyntacticMatches, 82 SemanticMatches, 1171 ConstructedPredicates, 20 IntricatePredicates, 6 DeprecatedPredicates, 19801 ImplicationChecksByTransitivity, 213.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=33, InterpolantAutomatonStates: 426, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 575 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 111.2s InterpolantComputationTime, 1558 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 2100 ConstructedInterpolants, 200 QuantifiedInterpolants, 32083 SizeOfPredicates, 457 NumberOfNonLiveVariables, 7526 ConjunctsInSsa, 1152 ConjunctsInUnsatCore, 79 InterpolantComputations, 14 PerfectInterpolantSequences, 761/1335 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 4.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 20, TOOLS_POST_TIME: 3.8s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 20, TOOLS_QUANTIFIERELIM_TIME: 3.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 1.1s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 34, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME: 0.1s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 2.7s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 2.7s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 106, DAG_COMPRESSION_RETAINED_NODES: 32, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-16 20:03:07,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2b68bfb-2e84-4eac-972e-77f076360969/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE