./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS --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 cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- 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-8393723 [2022-11-19 07:46:42,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:46:42,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:46:42,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:46:42,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:46:42,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:46:42,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:46:42,803 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:46:42,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:46:42,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:46:42,811 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:46:42,814 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:46:42,815 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:46:42,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:46:42,825 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:46:42,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:46:42,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:46:42,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:46:42,831 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:46:42,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:46:42,838 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:46:42,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:46:42,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:46:42,844 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:46:42,853 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:46:42,855 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:46:42,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:46:42,857 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:46:42,858 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:46:42,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:46:42,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:46:42,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:46:42,863 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:46:42,864 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:46:42,865 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:46:42,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:46:42,866 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:46:42,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:46:42,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:46:42,868 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:46:42,868 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:46:42,869 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 07:46:42,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:46:42,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:46:42,916 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:46:42,916 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:46:42,917 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:46:42,917 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:46:42,917 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:46:42,918 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:46:42,918 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:46:42,918 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:46:42,919 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:46:42,920 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:46:42,920 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:46:42,920 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:46:42,920 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:46:42,920 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:46:42,921 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:46:42,921 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:46:42,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:46:42,922 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:46:42,922 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:46:42,922 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:46:42,923 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:46:42,923 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:46:42,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:46:42,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:46:42,925 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:46:42,925 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:46:42,925 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 07:46:42,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:46:42,926 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:46:42,926 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:46:42,926 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:46:42,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:46:42,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:46:42,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:42,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:46:42,928 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:46:42,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:46:42,928 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:46:42,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:46:42,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:46:42,929 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_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2022-11-19 07:46:43,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:46:43,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:46:43,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:46:43,324 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:46:43,325 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:46:43,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-19 07:46:43,399 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/data/cf0d86400/70c4170ea5ad4bb5bf2372fd102a2193/FLAG636013f38 [2022-11-19 07:46:43,998 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:46:43,999 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-19 07:46:44,010 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/data/cf0d86400/70c4170ea5ad4bb5bf2372fd102a2193/FLAG636013f38 [2022-11-19 07:46:44,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/data/cf0d86400/70c4170ea5ad4bb5bf2372fd102a2193 [2022-11-19 07:46:44,304 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:46:44,306 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:46:44,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:44,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:46:44,313 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:46:44,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,315 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26c5d61b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44, skipping insertion in model container [2022-11-19 07:46:44,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:46:44,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:46:44,706 WARN L234 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_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-19 07:46:44,715 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:44,733 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:46:44,817 WARN L234 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_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-19 07:46:44,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:44,843 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:46:44,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44 WrapperNode [2022-11-19 07:46:44,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:44,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:44,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:46:44,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:46:44,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,885 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,934 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 117 [2022-11-19 07:46:44,935 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:44,936 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:46:44,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:46:44,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:46:44,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,964 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:44,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:45,000 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:45,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:45,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:46:45,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:46:45,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:46:45,006 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:46:45,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (1/1) ... [2022-11-19 07:46:45,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:45,070 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:46:45,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:46:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:46:45,107 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-19 07:46:45,107 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:46:45,108 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:46:45,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:46:45,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:46:45,230 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:46:45,232 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:46:45,684 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:46:45,751 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:46:45,751 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:46:45,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:45 BoogieIcfgContainer [2022-11-19 07:46:45,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:46:45,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:46:45,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:46:45,761 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:46:45,761 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:44" (1/3) ... [2022-11-19 07:46:45,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29c36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:45, skipping insertion in model container [2022-11-19 07:46:45,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:44" (2/3) ... [2022-11-19 07:46:45,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29c36d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:45, skipping insertion in model container [2022-11-19 07:46:45,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:45" (3/3) ... [2022-11-19 07:46:45,769 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2022-11-19 07:46:45,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:46:45,791 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-19 07:46:45,856 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:46:45,863 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;@5df4bd78, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:46:45,863 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-19 07:46:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 37 states have (on average 2.324324324324324) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:45,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:46:45,875 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:45,876 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:46:45,877 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash 174313290, now seen corresponding path program 1 times [2022-11-19 07:46:45,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:45,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126715559] [2022-11-19 07:46:45,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:45,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:46,204 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:46,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126715559] [2022-11-19 07:46:46,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126715559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:46,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:46,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:46:46,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792376688] [2022-11-19 07:46:46,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:46,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:46,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:46,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:46,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:46,253 INFO L87 Difference]: Start difference. First operand has 83 states, 37 states have (on average 2.324324324324324) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:46,430 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-19 07:46:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:46,433 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:46:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:46,442 INFO L225 Difference]: With dead ends: 81 [2022-11-19 07:46:46,442 INFO L226 Difference]: Without dead ends: 79 [2022-11-19 07:46:46,444 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 [2022-11-19 07:46:46,448 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:46,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:46:46,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-19 07:46:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-19 07:46:46,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:46,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-11-19 07:46:46,489 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 5 [2022-11-19 07:46:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:46,490 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-11-19 07:46:46,490 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:46,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-11-19 07:46:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 07:46:46,491 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:46,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 07:46:46,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:46:46,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:46,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:46,493 INFO L85 PathProgramCache]: Analyzing trace with hash 174313291, now seen corresponding path program 1 times [2022-11-19 07:46:46,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:46,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037793002] [2022-11-19 07:46:46,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:46,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:46,632 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:46,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037793002] [2022-11-19 07:46:46,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037793002] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:46,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:46,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:46:46,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839925693] [2022-11-19 07:46:46,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:46,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:46,636 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:46,714 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-11-19 07:46:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:46,715 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 07:46:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:46,716 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:46:46,716 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:46:46,717 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 [2022-11-19 07:46:46,718 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:46,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:46:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:46:46,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-19 07:46:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 36 states have (on average 2.138888888888889) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:46,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-19 07:46:46,727 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 5 [2022-11-19 07:46:46,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:46,728 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-19 07:46:46,728 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:46:46,728 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-19 07:46:46,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 07:46:46,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:46,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:46,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:46:46,730 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:46,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:46,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1147239271, now seen corresponding path program 1 times [2022-11-19 07:46:46,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:46,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698372068] [2022-11-19 07:46:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:46,847 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698372068] [2022-11-19 07:46:46,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698372068] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:46,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:46,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:46:46,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352444676] [2022-11-19 07:46:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:46,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:46,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:46,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:46,852 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:46:46,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:46,894 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-19 07:46:46,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:46,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-19 07:46:46,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:46,896 INFO L225 Difference]: With dead ends: 83 [2022-11-19 07:46:46,896 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 07:46:46,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:46,898 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:46,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 141 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:46:46,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 07:46:46,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-11-19 07:46:46,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 37 states have (on average 2.108108108108108) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-19 07:46:46,908 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 10 [2022-11-19 07:46:46,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:46,908 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-19 07:46:46,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 07:46:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-19 07:46:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:46:46,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:46,910 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:46,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:46:46,910 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:46,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:46,911 INFO L85 PathProgramCache]: Analyzing trace with hash -667240067, now seen corresponding path program 1 times [2022-11-19 07:46:46,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:46,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679692057] [2022-11-19 07:46:46,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:46,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:46,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:46:47,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:47,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679692057] [2022-11-19 07:46:47,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679692057] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:47,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:47,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:46:47,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896860465] [2022-11-19 07:46:47,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:47,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:47,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:47,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:47,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:47,050 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:46:47,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:47,266 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-11-19 07:46:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:46:47,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-19 07:46:47,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:47,269 INFO L225 Difference]: With dead ends: 129 [2022-11-19 07:46:47,270 INFO L226 Difference]: Without dead ends: 129 [2022-11-19 07:46:47,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:47,272 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:47,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:46:47,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-19 07:46:47,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 77. [2022-11-19 07:46:47,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 37 states have (on average 2.081081081081081) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-19 07:46:47,280 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 17 [2022-11-19 07:46:47,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:47,280 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-19 07:46:47,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:46:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-19 07:46:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:46:47,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:47,282 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:47,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:46:47,282 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:47,283 INFO L85 PathProgramCache]: Analyzing trace with hash -667240066, now seen corresponding path program 1 times [2022-11-19 07:46:47,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:47,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895487395] [2022-11-19 07:46:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:47,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:47,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:46:47,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:47,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895487395] [2022-11-19 07:46:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895487395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:47,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:47,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:46:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326411925] [2022-11-19 07:46:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:47,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:47,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:47,658 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:46:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:47,828 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-11-19 07:46:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:46:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-19 07:46:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:47,831 INFO L225 Difference]: With dead ends: 77 [2022-11-19 07:46:47,832 INFO L226 Difference]: Without dead ends: 77 [2022-11-19 07:46:47,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:46:47,838 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:47,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 173 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:46:47,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-19 07:46:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-11-19 07:46:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 37 states have (on average 2.054054054054054) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-11-19 07:46:47,855 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 17 [2022-11-19 07:46:47,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:47,855 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-11-19 07:46:47,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:46:47,856 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-11-19 07:46:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:46:47,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:47,857 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:47,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:46:47,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1267444548, now seen corresponding path program 1 times [2022-11-19 07:46:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:47,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731011441] [2022-11-19 07:46:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:47,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:47,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:46:48,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731011441] [2022-11-19 07:46:48,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731011441] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34317591] [2022-11-19 07:46:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:48,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:48,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:48,221 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:48,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:46:48,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:48,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:46:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:48,438 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 [2022-11-19 07:46:48,499 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_158 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_158))))) is different from true [2022-11-19 07:46:48,561 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:46:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:46:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-19 07:46:48,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:48,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34317591] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:48,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1794759347] [2022-11-19 07:46:48,679 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:46:48,679 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:48,686 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:48,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:48,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:48,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,796 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 [2022-11-19 07:46:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:48,917 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 [2022-11-19 07:46:48,923 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 [2022-11-19 07:46:48,942 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 15 treesize of output 1 [2022-11-19 07:46:48,948 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 11 treesize of output 7 [2022-11-19 07:46:48,956 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 11 treesize of output 7 [2022-11-19 07:46:48,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,979 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 27 treesize of output 11 [2022-11-19 07:46:48,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:48,995 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 27 treesize of output 11 [2022-11-19 07:46:49,006 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 [2022-11-19 07:46:49,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:46:49,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:49,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:49,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:46:49,581 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:46:49,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:46:49,882 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 9 treesize of output 3 [2022-11-19 07:46:49,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-19 07:46:49,910 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 7 treesize of output 3 [2022-11-19 07:46:49,928 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 7 treesize of output 3 [2022-11-19 07:46:49,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:49,958 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:49,961 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:49,965 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:49,967 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:49,969 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,132 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:46:50,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:46:50,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:50,466 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 7 treesize of output 3 [2022-11-19 07:46:50,479 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 9 treesize of output 3 [2022-11-19 07:46:50,495 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 7 treesize of output 3 [2022-11-19 07:46:50,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 9 [2022-11-19 07:46:50,524 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,526 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,529 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,531 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,534 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:50,638 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 19 treesize of output 11 [2022-11-19 07:46:50,651 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 11 [2022-11-19 07:46:50,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:50,668 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 23 treesize of output 11 [2022-11-19 07:46:50,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:50,918 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 133 treesize of output 117 [2022-11-19 07:46:50,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:46:50,954 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 129 treesize of output 117 [2022-11-19 07:46:50,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:46:50,969 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 121 treesize of output 109 [2022-11-19 07:46:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:51,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:51,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:51,324 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 07:46:51,594 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:53,941 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1026#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:53,941 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:53,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:46:53,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-19 07:46:53,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214777063] [2022-11-19 07:46:53,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:53,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:46:53,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:53,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:46:53,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=433, Unknown=1, NotChecked=42, Total=552 [2022-11-19 07:46:53,944 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:46:54,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:54,285 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-11-19 07:46:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:46:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-19 07:46:54,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:54,286 INFO L225 Difference]: With dead ends: 126 [2022-11-19 07:46:54,286 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:46:54,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=90, Invalid=513, Unknown=1, NotChecked=46, Total=650 [2022-11-19 07:46:54,288 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:54,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 289 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 352 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-11-19 07:46:54,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:46:54,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2022-11-19 07:46:54,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:46:54,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-19 07:46:54,294 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 19 [2022-11-19 07:46:54,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:54,298 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-19 07:46:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 07:46:54,299 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-19 07:46:54,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 07:46:54,299 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:54,300 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:46:54,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:46:54,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:54,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:46:54,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:54,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1267444547, now seen corresponding path program 1 times [2022-11-19 07:46:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:54,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951316692] [2022-11-19 07:46:54,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:54,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:46:54,838 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951316692] [2022-11-19 07:46:54,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951316692] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684668620] [2022-11-19 07:46:54,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:54,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:46:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:54,840 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:46:54,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:46:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 07:46:54,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:46:54,971 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 [2022-11-19 07:46:54,977 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 [2022-11-19 07:46:55,118 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (exists ((v_ArrVal_236 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_236) |c_#length|)))) is different from true [2022-11-19 07:46:55,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,144 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 14 [2022-11-19 07:46:55,151 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:46:55,151 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 [2022-11-19 07:46:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-11-19 07:46:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:46:55,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684668620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:46:55,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542570028] [2022-11-19 07:46:55,328 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-19 07:46:55,329 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:46:55,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:46:55,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:46:55,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:46:55,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,351 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 [2022-11-19 07:46:55,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:55,389 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 [2022-11-19 07:46:55,398 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 [2022-11-19 07:46:55,406 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 15 treesize of output 1 [2022-11-19 07:46:55,411 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 11 treesize of output 7 [2022-11-19 07:46:55,415 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 11 treesize of output 7 [2022-11-19 07:46:55,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,425 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 27 treesize of output 11 [2022-11-19 07:46:55,432 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 [2022-11-19 07:46:55,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,439 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 27 treesize of output 11 [2022-11-19 07:46:55,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:46:55,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:55,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:46:55,730 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:46:55,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:46:55,976 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 7 treesize of output 3 [2022-11-19 07:46:55,985 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 7 treesize of output 3 [2022-11-19 07:46:55,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:56,006 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 7 treesize of output 3 [2022-11-19 07:46:56,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:56,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,034 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,036 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,136 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:46:56,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:46:56,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:56,344 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 7 treesize of output 3 [2022-11-19 07:46:56,353 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 7 treesize of output 3 [2022-11-19 07:46:56,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:46:56,374 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 7 treesize of output 3 [2022-11-19 07:46:56,389 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,391 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,393 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,396 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:46:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,454 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 23 treesize of output 11 [2022-11-19 07:46:56,468 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 19 treesize of output 11 [2022-11-19 07:46:56,480 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 19 treesize of output 11 [2022-11-19 07:46:56,696 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 [2022-11-19 07:46:56,705 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 [2022-11-19 07:46:56,715 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 [2022-11-19 07:46:56,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:46:56,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:46:56,986 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 07:46:57,219 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:46:59,721 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1332#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (< (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:46:59,722 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:46:59,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:46:59,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-19 07:46:59,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040615540] [2022-11-19 07:46:59,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:46:59,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:46:59,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:59,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:46:59,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=721, Unknown=1, NotChecked=54, Total=870 [2022-11-19 07:46:59,729 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:00,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:00,384 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-11-19 07:47:00,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:47:00,385 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-11-19 07:47:00,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:00,387 INFO L225 Difference]: With dead ends: 126 [2022-11-19 07:47:00,387 INFO L226 Difference]: Without dead ends: 126 [2022-11-19 07:47:00,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=121, Invalid=938, Unknown=1, NotChecked=62, Total=1122 [2022-11-19 07:47:00,390 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 170 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:00,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 228 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 564 Invalid, 0 Unknown, 141 Unchecked, 0.5s Time] [2022-11-19 07:47:00,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-19 07:47:00,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2022-11-19 07:47:00,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 37 states have (on average 2.0) internal successors, (74), 70 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:00,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-19 07:47:00,409 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 19 [2022-11-19 07:47:00,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:00,410 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-19 07:47:00,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:00,411 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-19 07:47:00,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:47:00,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:00,413 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:00,427 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:00,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:00,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:00,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:00,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1756629474, now seen corresponding path program 1 times [2022-11-19 07:47:00,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:00,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251093448] [2022-11-19 07:47:00,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:00,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 07:47:00,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:00,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251093448] [2022-11-19 07:47:00,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251093448] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295522270] [2022-11-19 07:47:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:00,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:00,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:00,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:00,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:47:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:01,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 07:47:01,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:01,067 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 [2022-11-19 07:47:01,088 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 [2022-11-19 07:47:01,181 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:47:01,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:47:01,226 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 [2022-11-19 07:47:01,236 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_326 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_326))) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-19 07:47:01,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,263 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 14 [2022-11-19 07:47:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-19 07:47:01,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:01,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295522270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:01,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310495821] [2022-11-19 07:47:01,341 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:47:01,342 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:01,342 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:01,342 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:01,342 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:01,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,369 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 [2022-11-19 07:47:01,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:01,415 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 [2022-11-19 07:47:01,420 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 [2022-11-19 07:47:01,427 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 15 treesize of output 1 [2022-11-19 07:47:01,431 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 11 treesize of output 7 [2022-11-19 07:47:01,436 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 11 treesize of output 7 [2022-11-19 07:47:01,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,445 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 27 treesize of output 11 [2022-11-19 07:47:01,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,451 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 27 treesize of output 11 [2022-11-19 07:47:01,458 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 [2022-11-19 07:47:01,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:01,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:01,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:01,669 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:01,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:47:01,892 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 7 treesize of output 3 [2022-11-19 07:47:01,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:01,924 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 7 treesize of output 3 [2022-11-19 07:47:01,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:01,942 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 7 treesize of output 3 [2022-11-19 07:47:01,954 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:01,956 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:01,958 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:01,960 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:01,962 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:02,026 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:02,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:47:02,221 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 7 treesize of output 3 [2022-11-19 07:47:02,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:02,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:02,248 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 7 treesize of output 3 [2022-11-19 07:47:02,257 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 7 treesize of output 3 [2022-11-19 07:47:02,270 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:02,272 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:02,276 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:02,278 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:02,329 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 23 treesize of output 11 [2022-11-19 07:47:02,339 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 11 [2022-11-19 07:47:02,349 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 19 treesize of output 11 [2022-11-19 07:47:02,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:02,564 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 133 treesize of output 117 [2022-11-19 07:47:02,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:02,576 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-19 07:47:02,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:02,589 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 125 treesize of output 113 [2022-11-19 07:47:02,633 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 [2022-11-19 07:47:02,643 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 11 treesize of output 7 [2022-11-19 07:47:02,659 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 [2022-11-19 07:47:02,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:02,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:02,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:02,932 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 07:47:03,153 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:03,934 WARN L859 $PredicateComparison]: unable to prove that (and (< |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (let ((.cse4 (+ |c_node_create_~temp~0#1.offset| 4))) (let ((.cse3 (select |c_old(#memory_int)| |c_node_create_~temp~0#1.base|)) (.cse1 (= |c_#NULL.offset| 0)) (.cse2 (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.offset)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse4 (select (select |c_#memory_$Pointer$.offset| |c_node_create_~temp~0#1.base|) .cse4))))) (.cse5 (= |c_#NULL.base| 0)) (.cse6 (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| 1))) (.cse7 (= (store |c_old(#length)| |c_node_create_~temp~0#1.base| 8) |c_#length|)) (.cse8 (= (select |c_old(#valid)| |c_node_create_~temp~0#1.base|) 0)) (.cse9 (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| (store (store (select |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base|) |c_node_create_~temp~0#1.offset| 0) .cse4 (select (select |c_#memory_$Pointer$.base| |c_node_create_~temp~0#1.base|) .cse4)))))) (or (let ((.cse0 (select |c_old(#memory_int)| 1))) (and (< 0 |c_#StackHeapBarrier|) (= |c_node_create_#in~data#1| 1) (= 48 (select .cse0 0)) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_32| Int)) (and (not (= |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_32| 0)) (< |c_#StackHeapBarrier| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_32|) (= (select |c_old(#valid)| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_32|) 1) (= (select |c_old(#length)| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_32|) 4))) .cse1 (= (select |c_old(#valid)| 1) 1) .cse2 (exists ((v_DerPreprocessor_5 Int)) (= (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse3 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_5) .cse4 |c_node_create_~data#1|)) |c_#memory_int|)) (= (select |c_old(#valid)| 2) 1) (= (select |c_old(#valid)| 0) 0) .cse5 .cse6 (= (select .cse0 1) 0) .cse7 .cse8 (= (select |c_old(#length)| 1) 2) (= 19 (select |c_old(#length)| 2)) .cse9)) (and (exists ((v_DerPreprocessor_6 Int)) (= (store |c_old(#memory_int)| |c_node_create_~temp~0#1.base| (store (store .cse3 |c_node_create_~temp~0#1.offset| v_DerPreprocessor_6) .cse4 |c_node_create_~data#1|)) |c_#memory_int|)) .cse1 .cse2 .cse5 .cse6 .cse7 .cse8 .cse9)))) (<= (+ 8 |c_node_create_~temp~0#1.offset|) (select |c_#length| |c_node_create_~temp~0#1.base|)) (not (= |c_node_create_~temp~0#1.base| 0)) (= |c_node_create_#in~data#1| |c_node_create_~data#1|) (<= 0 |c_#NULL.base|) (= |c_node_create_~temp~0#1.offset| 0) (<= 1 |c_node_create_#in~data#1|) (= (select |c_#valid| |c_node_create_~temp~0#1.base|) 1) (<= 0 |c_#NULL.offset|) (= |c_node_create_~temp~0#1.base| |c_node_create_#res#1.base|) (<= 0 |c_#StackHeapBarrier|) (= |c_node_create_#res#1.offset| |c_node_create_~temp~0#1.offset|) (<= |c_node_create_#in~data#1| 1) (<= |c_#NULL.base| 0) (<= |c_#NULL.offset| 0)) is different from true [2022-11-19 07:47:05,717 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1651#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_~head#1.base| |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#NULL.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:05,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:05,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:05,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-19 07:47:05,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135571561] [2022-11-19 07:47:05,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:05,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-19 07:47:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-19 07:47:05,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=706, Unknown=2, NotChecked=110, Total=930 [2022-11-19 07:47:05,720 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:06,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:06,184 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-11-19 07:47:06,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:47:06,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 07:47:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:06,186 INFO L225 Difference]: With dead ends: 119 [2022-11-19 07:47:06,187 INFO L226 Difference]: Without dead ends: 119 [2022-11-19 07:47:06,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=138, Invalid=924, Unknown=2, NotChecked=126, Total=1190 [2022-11-19 07:47:06,188 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 224 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:06,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 235 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 356 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-11-19 07:47:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-19 07:47:06,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2022-11-19 07:47:06,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.875) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-19 07:47:06,193 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 21 [2022-11-19 07:47:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:06,194 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-19 07:47:06,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:06,194 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-19 07:47:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 07:47:06,195 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:06,195 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:06,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:06,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:06,403 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:06,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1756629475, now seen corresponding path program 1 times [2022-11-19 07:47:06,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:06,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896353291] [2022-11-19 07:47:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:06,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:06,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:06,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:06,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896353291] [2022-11-19 07:47:06,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896353291] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:06,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614359541] [2022-11-19 07:47:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:06,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:06,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:06,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:06,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:47:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:07,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:47:07,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:07,033 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 [2022-11-19 07:47:07,063 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 [2022-11-19 07:47:07,071 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_415 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_415) |c_#length|)) (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-19 07:47:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,105 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 14 [2022-11-19 07:47:07,129 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 [2022-11-19 07:47:07,137 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (< |node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_416 Int)) (= |c_#length| (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_416))))) is different from true [2022-11-19 07:47:07,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,174 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 14 [2022-11-19 07:47:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2022-11-19 07:47:07,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:07,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614359541] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:07,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1799790392] [2022-11-19 07:47:07,335 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-19 07:47:07,335 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:07,336 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:07,336 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:07,336 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,358 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 [2022-11-19 07:47:07,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:07,395 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 [2022-11-19 07:47:07,399 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 [2022-11-19 07:47:07,405 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 11 treesize of output 7 [2022-11-19 07:47:07,410 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 15 treesize of output 1 [2022-11-19 07:47:07,414 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 11 treesize of output 7 [2022-11-19 07:47:07,422 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 [2022-11-19 07:47:07,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,428 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 27 treesize of output 11 [2022-11-19 07:47:07,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,435 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 27 treesize of output 11 [2022-11-19 07:47:07,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:07,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:07,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,568 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:07,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:07,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,605 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 7 treesize of output 3 [2022-11-19 07:47:07,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,626 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 7 treesize of output 3 [2022-11-19 07:47:07,635 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 7 treesize of output 3 [2022-11-19 07:47:07,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,660 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:07,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:07,686 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 7 treesize of output 3 [2022-11-19 07:47:07,697 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 7 treesize of output 3 [2022-11-19 07:47:07,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,729 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 7 treesize of output 3 [2022-11-19 07:47:07,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,796 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 19 treesize of output 11 [2022-11-19 07:47:07,806 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 19 treesize of output 11 [2022-11-19 07:47:07,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,823 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 23 treesize of output 11 [2022-11-19 07:47:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,881 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:07,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:07,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,918 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 7 treesize of output 3 [2022-11-19 07:47:07,927 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 7 treesize of output 3 [2022-11-19 07:47:07,945 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 7 treesize of output 3 [2022-11-19 07:47:07,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:07,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,985 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:07,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:08,016 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 7 treesize of output 3 [2022-11-19 07:47:08,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,051 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 7 treesize of output 3 [2022-11-19 07:47:08,067 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 7 treesize of output 3 [2022-11-19 07:47:08,136 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 19 treesize of output 11 [2022-11-19 07:47:08,146 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 11 [2022-11-19 07:47:08,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,158 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 23 treesize of output 11 [2022-11-19 07:47:08,231 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:08,231 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:08,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 07:47:08,276 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:08,276 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,358 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:08,359 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:08,387 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 7 treesize of output 3 [2022-11-19 07:47:08,395 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 7 treesize of output 3 [2022-11-19 07:47:08,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,415 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 7 treesize of output 3 [2022-11-19 07:47:08,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,462 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:08,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:08,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,499 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 7 treesize of output 3 [2022-11-19 07:47:08,507 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 7 treesize of output 3 [2022-11-19 07:47:08,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:08,530 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 7 treesize of output 3 [2022-11-19 07:47:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,583 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:08,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:08,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:08,633 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-19 07:47:08,916 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:14,627 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1963#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|)) (< |ULTIMATE.start_sll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) 4) |ULTIMATE.start_sll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (< |ULTIMATE.start_sll_circular_create_~last~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_sll_circular_create_~last~0#1.base| 0)) (= (+ |ULTIMATE.start_sll_circular_create_~len#1| 1) |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_sll_circular_remove_first_~head#1.base| |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| |ULTIMATE.start_sll_circular_create_~data#1|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) 0) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= 8 (select |#length| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.base| 0)) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (not (<= (+ 4 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|))) (= |ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:14,627 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:14,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:14,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2022-11-19 07:47:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663254190] [2022-11-19 07:47:14,628 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:47:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:47:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=711, Unknown=3, NotChecked=110, Total=930 [2022-11-19 07:47:14,630 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:15,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:15,183 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-11-19 07:47:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:47:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-19 07:47:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:15,185 INFO L225 Difference]: With dead ends: 69 [2022-11-19 07:47:15,185 INFO L226 Difference]: Without dead ends: 69 [2022-11-19 07:47:15,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=148, Invalid=979, Unknown=3, NotChecked=130, Total=1260 [2022-11-19 07:47:15,187 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:15,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 189 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 260 Invalid, 0 Unknown, 134 Unchecked, 0.2s Time] [2022-11-19 07:47:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-19 07:47:15,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-11-19 07:47:15,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.6) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:15,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-19 07:47:15,191 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 21 [2022-11-19 07:47:15,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:15,192 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-19 07:47:15,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 07:47:15,192 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-19 07:47:15,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:47:15,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:15,193 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:15,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:15,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-19 07:47:15,399 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:15,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1379061143, now seen corresponding path program 1 times [2022-11-19 07:47:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872572990] [2022-11-19 07:47:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:15,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:15,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-19 07:47:15,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:15,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872572990] [2022-11-19 07:47:15,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872572990] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:15,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:15,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:47:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398973015] [2022-11-19 07:47:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:47:15,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:47:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:15,614 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:15,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:15,918 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-11-19 07:47:15,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:47:15,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-19 07:47:15,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:15,920 INFO L225 Difference]: With dead ends: 97 [2022-11-19 07:47:15,920 INFO L226 Difference]: Without dead ends: 97 [2022-11-19 07:47:15,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:47:15,921 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 134 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:15,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 223 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:15,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-19 07:47:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2022-11-19 07:47:15,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:15,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-19 07:47:15,931 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 22 [2022-11-19 07:47:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:15,931 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-19 07:47:15,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-19 07:47:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 07:47:15,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:15,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:15,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:47:15,932 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:15,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:15,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1379061142, now seen corresponding path program 1 times [2022-11-19 07:47:15,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:15,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134178636] [2022-11-19 07:47:15,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:15,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:16,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:16,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134178636] [2022-11-19 07:47:16,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134178636] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:16,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:16,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:47:16,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338529106] [2022-11-19 07:47:16,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:16,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:47:16,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:16,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:47:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:16,275 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:16,584 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-11-19 07:47:16,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-19 07:47:16,584 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-19 07:47:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:16,585 INFO L225 Difference]: With dead ends: 91 [2022-11-19 07:47:16,585 INFO L226 Difference]: Without dead ends: 91 [2022-11-19 07:47:16,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-19 07:47:16,586 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 224 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:16,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 233 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-19 07:47:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2022-11-19 07:47:16,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:16,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-11-19 07:47:16,589 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 22 [2022-11-19 07:47:16,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:16,590 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-11-19 07:47:16,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,590 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-11-19 07:47:16,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-19 07:47:16,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:16,591 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:16,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:47:16,591 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:16,591 INFO L85 PathProgramCache]: Analyzing trace with hash 202425014, now seen corresponding path program 1 times [2022-11-19 07:47:16,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:16,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424468894] [2022-11-19 07:47:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:16,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:16,651 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:16,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424468894] [2022-11-19 07:47:16,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424468894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:16,652 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:16,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:16,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016664298] [2022-11-19 07:47:16,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:16,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:16,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:16,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:16,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:16,654 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:16,682 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-11-19 07:47:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-19 07:47:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:16,684 INFO L225 Difference]: With dead ends: 96 [2022-11-19 07:47:16,684 INFO L226 Difference]: Without dead ends: 96 [2022-11-19 07:47:16,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:16,685 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 124 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:16,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 102 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:47:16,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-19 07:47:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-11-19 07:47:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.575) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-19 07:47:16,689 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 23 [2022-11-19 07:47:16,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:16,689 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-19 07:47:16,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,689 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-19 07:47:16,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:47:16,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:16,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:16,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 07:47:16,691 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:16,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:16,691 INFO L85 PathProgramCache]: Analyzing trace with hash -876523653, now seen corresponding path program 1 times [2022-11-19 07:47:16,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:16,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382421094] [2022-11-19 07:47:16,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:16,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:16,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:16,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382421094] [2022-11-19 07:47:16,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382421094] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:16,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:16,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496612450] [2022-11-19 07:47:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:16,767 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:16,861 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-19 07:47:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-19 07:47:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:16,863 INFO L225 Difference]: With dead ends: 63 [2022-11-19 07:47:16,863 INFO L226 Difference]: Without dead ends: 63 [2022-11-19 07:47:16,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:16,864 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 35 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:16,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 95 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:16,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-19 07:47:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-11-19 07:47:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-11-19 07:47:16,867 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 26 [2022-11-19 07:47:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:16,867 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-11-19 07:47:16,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-11-19 07:47:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:47:16,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:16,869 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:16,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:47:16,869 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:16,869 INFO L85 PathProgramCache]: Analyzing trace with hash -876523652, now seen corresponding path program 1 times [2022-11-19 07:47:16,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:16,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598789739] [2022-11-19 07:47:16,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:16,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:17,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:17,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598789739] [2022-11-19 07:47:17,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598789739] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:17,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:17,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 07:47:17,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929656788] [2022-11-19 07:47:17,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:17,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:47:17,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:47:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:47:17,274 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:17,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:17,683 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-11-19 07:47:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:47:17,684 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-19 07:47:17,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:17,685 INFO L225 Difference]: With dead ends: 107 [2022-11-19 07:47:17,685 INFO L226 Difference]: Without dead ends: 107 [2022-11-19 07:47:17,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:47:17,686 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 257 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:17,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 298 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:47:17,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-19 07:47:17,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2022-11-19 07:47:17,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.489795918367347) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:17,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-19 07:47:17,690 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 26 [2022-11-19 07:47:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:17,691 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-19 07:47:17,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:17,691 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-19 07:47:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 07:47:17,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:17,692 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:47:17,692 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -876540258, now seen corresponding path program 1 times [2022-11-19 07:47:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178959458] [2022-11-19 07:47:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:17,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:17,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:17,893 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:17,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178959458] [2022-11-19 07:47:17,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178959458] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:17,893 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:17,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:47:17,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965275008] [2022-11-19 07:47:17,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:17,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:47:17,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:47:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:17,896 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:18,148 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-11-19 07:47:18,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:47:18,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-19 07:47:18,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:18,149 INFO L225 Difference]: With dead ends: 115 [2022-11-19 07:47:18,150 INFO L226 Difference]: Without dead ends: 115 [2022-11-19 07:47:18,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-19 07:47:18,150 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 247 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:18,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 274 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:18,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-19 07:47:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2022-11-19 07:47:18,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-19 07:47:18,154 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 26 [2022-11-19 07:47:18,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:18,154 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-19 07:47:18,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,154 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-19 07:47:18,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:47:18,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:18,155 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:18,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:47:18,155 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1402944135, now seen corresponding path program 1 times [2022-11-19 07:47:18,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700483898] [2022-11-19 07:47:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:18,335 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:18,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700483898] [2022-11-19 07:47:18,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700483898] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:18,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:18,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:47:18,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305051166] [2022-11-19 07:47:18,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:18,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 07:47:18,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:18,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 07:47:18,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-19 07:47:18,338 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:18,643 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-11-19 07:47:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:47:18,643 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-19 07:47:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:18,644 INFO L225 Difference]: With dead ends: 100 [2022-11-19 07:47:18,644 INFO L226 Difference]: Without dead ends: 100 [2022-11-19 07:47:18,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:47:18,645 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 190 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:18,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 226 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-19 07:47:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-11-19 07:47:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.507936507936508) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-19 07:47:18,648 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 27 [2022-11-19 07:47:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:18,649 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-19 07:47:18,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-19 07:47:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 07:47:18,649 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:18,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:18,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:47:18,650 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash -541595136, now seen corresponding path program 1 times [2022-11-19 07:47:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:18,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083207590] [2022-11-19 07:47:18,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:18,721 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:18,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083207590] [2022-11-19 07:47:18,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083207590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:18,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:18,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:47:18,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873783534] [2022-11-19 07:47:18,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:18,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:18,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:18,723 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:18,815 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-11-19 07:47:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:18,816 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-19 07:47:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:18,817 INFO L225 Difference]: With dead ends: 83 [2022-11-19 07:47:18,817 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 07:47:18,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:47:18,817 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:18,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 07:47:18,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-19 07:47:18,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:18,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-11-19 07:47:18,820 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 28 [2022-11-19 07:47:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:18,820 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-11-19 07:47:18,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:18,821 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-11-19 07:47:18,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 07:47:18,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:18,821 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:47:18,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 07:47:18,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash 390420060, now seen corresponding path program 1 times [2022-11-19 07:47:18,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:18,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124978211] [2022-11-19 07:47:18,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:19,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:19,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124978211] [2022-11-19 07:47:19,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124978211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:19,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639117571] [2022-11-19 07:47:19,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:19,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:19,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:19,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:19,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:47:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:19,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 07:47:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:19,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:19,376 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 14 [2022-11-19 07:47:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:19,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:47:19,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639117571] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:19,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:47:19,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-19 07:47:19,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780356668] [2022-11-19 07:47:19,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:19,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:47:19,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:19,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:47:19,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-19 07:47:19,382 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:19,507 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-11-19 07:47:19,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:19,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-19 07:47:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:19,509 INFO L225 Difference]: With dead ends: 82 [2022-11-19 07:47:19,509 INFO L226 Difference]: Without dead ends: 82 [2022-11-19 07:47:19,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-19 07:47:19,510 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 150 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:19,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 57 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:47:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-19 07:47:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-19 07:47:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 78 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 07:47:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-11-19 07:47:19,512 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 29 [2022-11-19 07:47:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:19,513 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-11-19 07:47:19,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-11-19 07:47:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:47:19,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:19,513 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:47:19,526 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:19,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:47:19,721 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:19,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1667029142, now seen corresponding path program 1 times [2022-11-19 07:47:19,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:19,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872004075] [2022-11-19 07:47:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:19,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:20,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:20,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872004075] [2022-11-19 07:47:20,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872004075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131842371] [2022-11-19 07:47:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:20,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:20,306 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:20,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:47:20,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-19 07:47:20,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:20,498 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 [2022-11-19 07:47:20,584 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:20,584 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 [2022-11-19 07:47:20,649 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 11 treesize of output 7 [2022-11-19 07:47:20,701 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:47:20,701 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 56 treesize of output 49 [2022-11-19 07:47:20,809 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 45 treesize of output 33 [2022-11-19 07:47:20,895 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-19 07:47:20,895 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-19 07:47:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:20,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:20,937 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 32 treesize of output 24 [2022-11-19 07:47:20,947 INFO L321 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-11-19 07:47:20,948 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 25 [2022-11-19 07:47:20,956 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_930 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_930))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (= (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|))))) is different from false [2022-11-19 07:47:20,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:20,971 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 53 treesize of output 37 [2022-11-19 07:47:21,021 INFO L321 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-19 07:47:21,021 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 6 case distinctions, treesize of input 115 treesize of output 131 [2022-11-19 07:47:21,036 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:21,037 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 104 treesize of output 100 [2022-11-19 07:47:21,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131842371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:21,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2107405989] [2022-11-19 07:47:21,273 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 07:47:21,273 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:21,274 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:21,274 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:21,274 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:21,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,296 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 [2022-11-19 07:47:21,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:21,337 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 [2022-11-19 07:47:21,341 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 [2022-11-19 07:47:21,348 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 11 treesize of output 7 [2022-11-19 07:47:21,353 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 15 treesize of output 1 [2022-11-19 07:47:21,357 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 11 treesize of output 7 [2022-11-19 07:47:21,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,366 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 27 treesize of output 11 [2022-11-19 07:47:21,372 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 [2022-11-19 07:47:21,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,378 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 27 treesize of output 11 [2022-11-19 07:47:21,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:21,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:21,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:21,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,508 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:21,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:21,537 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 7 treesize of output 3 [2022-11-19 07:47:21,545 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 7 treesize of output 3 [2022-11-19 07:47:21,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,564 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 7 treesize of output 3 [2022-11-19 07:47:21,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,602 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:21,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:21,630 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 7 treesize of output 3 [2022-11-19 07:47:21,639 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 7 treesize of output 3 [2022-11-19 07:47:21,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,656 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 7 treesize of output 3 [2022-11-19 07:47:21,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,737 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 11 [2022-11-19 07:47:21,750 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 19 treesize of output 11 [2022-11-19 07:47:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,761 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 23 treesize of output 11 [2022-11-19 07:47:21,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,820 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:21,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:21,849 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 7 treesize of output 3 [2022-11-19 07:47:21,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,885 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 7 treesize of output 3 [2022-11-19 07:47:21,895 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 7 treesize of output 3 [2022-11-19 07:47:21,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:21,924 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:21,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:21,953 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 7 treesize of output 3 [2022-11-19 07:47:21,962 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 7 treesize of output 3 [2022-11-19 07:47:21,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:21,986 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 7 treesize of output 3 [2022-11-19 07:47:21,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:22,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:22,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,101 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 234 [2022-11-19 07:47:22,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:22,131 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-19 07:47:22,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:22,146 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-19 07:47:22,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,229 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:22,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:22,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:22,273 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 7 treesize of output 3 [2022-11-19 07:47:22,286 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 7 treesize of output 3 [2022-11-19 07:47:22,296 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 7 treesize of output 3 [2022-11-19 07:47:22,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:22,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,329 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:22,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:22,360 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 7 treesize of output 3 [2022-11-19 07:47:22,370 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 7 treesize of output 3 [2022-11-19 07:47:22,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:22,393 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 7 treesize of output 3 [2022-11-19 07:47:22,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:22,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,510 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:22,510 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:22,574 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:22,575 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:22,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 07:47:22,614 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:22,614 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:22,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:22,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:22,985 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-19 07:47:23,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:33,492 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4014#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~last~1#1.base|) 1)) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:33,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:33,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:33,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-11-19 07:47:33,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069752311] [2022-11-19 07:47:33,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-19 07:47:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-19 07:47:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2141, Unknown=1, NotChecked=94, Total=2450 [2022-11-19 07:47:33,495 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:47:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:34,318 INFO L93 Difference]: Finished difference Result 125 states and 139 transitions. [2022-11-19 07:47:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:47:34,319 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-19 07:47:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:34,321 INFO L225 Difference]: With dead ends: 125 [2022-11-19 07:47:34,321 INFO L226 Difference]: Without dead ends: 125 [2022-11-19 07:47:34,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=276, Invalid=2697, Unknown=1, NotChecked=106, Total=3080 [2022-11-19 07:47:34,323 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 99 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:34,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 615 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 781 Invalid, 0 Unknown, 52 Unchecked, 0.5s Time] [2022-11-19 07:47:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-19 07:47:34,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2022-11-19 07:47:34,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 92 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:47:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-19 07:47:34,331 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 30 [2022-11-19 07:47:34,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:34,332 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-19 07:47:34,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:47:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-19 07:47:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:47:34,333 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:34,333 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:47:34,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:34,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:34,540 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:34,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:34,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1667029143, now seen corresponding path program 1 times [2022-11-19 07:47:34,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:34,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002219113] [2022-11-19 07:47:34,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:34,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:34,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:35,621 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:35,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002219113] [2022-11-19 07:47:35,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002219113] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:35,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829784218] [2022-11-19 07:47:35,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:35,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:35,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:35,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:35,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:47:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-19 07:47:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:35,846 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 [2022-11-19 07:47:36,090 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:36,090 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 [2022-11-19 07:47:36,178 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 11 treesize of output 7 [2022-11-19 07:47:36,183 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 11 treesize of output 7 [2022-11-19 07:47:36,263 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:47:36,263 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 74 treesize of output 61 [2022-11-19 07:47:36,271 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 [2022-11-19 07:47:36,548 INFO L321 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-11-19 07:47:36,549 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 51 [2022-11-19 07:47:36,556 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-19 07:47:36,556 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-11-19 07:47:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:36,864 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:36,865 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 80 treesize of output 84 [2022-11-19 07:47:36,934 WARN L837 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021))) (let ((.cse2 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (< (select (select .cse0 .cse1) .cse2) 1) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020))) (let ((.cse3 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse3)) (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse4 .cse3) .cse5)) (not (= .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse6)) (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021))) (let ((.cse8 (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= 0 (select (select .cse7 .cse6) .cse8)) (not (= .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))) is different from false [2022-11-19 07:47:36,997 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:36,998 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 68 treesize of output 60 [2022-11-19 07:47:37,004 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,005 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 60 treesize of output 44 [2022-11-19 07:47:37,068 INFO L321 Elim1Store]: treesize reduction 61, result has 45.0 percent of original size [2022-11-19 07:47:37,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 172 treesize of output 175 [2022-11-19 07:47:37,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,104 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 208 [2022-11-19 07:47:37,115 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 156 treesize of output 144 [2022-11-19 07:47:37,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,142 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 173 [2022-11-19 07:47:37,776 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,776 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 1 case distinctions, treesize of input 68 treesize of output 52 [2022-11-19 07:47:37,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,786 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 1 case distinctions, treesize of input 52 treesize of output 44 [2022-11-19 07:47:37,817 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:37,817 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 130 [2022-11-19 07:47:38,004 INFO L321 Elim1Store]: treesize reduction 140, result has 43.8 percent of original size [2022-11-19 07:47:38,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 234 treesize of output 284 [2022-11-19 07:47:38,057 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:38,058 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 202 treesize of output 206 [2022-11-19 07:47:38,076 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 90 treesize of output 74 [2022-11-19 07:47:39,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:39,547 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 1 case distinctions, treesize of input 68 treesize of output 60 [2022-11-19 07:47:39,556 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:39,556 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 1 case distinctions, treesize of input 60 treesize of output 44 [2022-11-19 07:47:39,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:39,617 INFO L321 Elim1Store]: treesize reduction 72, result has 35.1 percent of original size [2022-11-19 07:47:39,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 104 [2022-11-19 07:47:39,668 INFO L321 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-11-19 07:47:39,669 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 3 case distinctions, treesize of input 85 treesize of output 97 [2022-11-19 07:47:39,678 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 49 treesize of output 45 [2022-11-19 07:47:39,687 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 60 treesize of output 52 [2022-11-19 07:47:40,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829784218] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:40,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [863060600] [2022-11-19 07:47:40,053 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 07:47:40,053 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:40,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:40,054 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:40,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,073 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 [2022-11-19 07:47:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:40,110 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 [2022-11-19 07:47:40,115 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 [2022-11-19 07:47:40,121 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 11 treesize of output 7 [2022-11-19 07:47:40,126 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 15 treesize of output 1 [2022-11-19 07:47:40,131 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 11 treesize of output 7 [2022-11-19 07:47:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,139 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 27 treesize of output 11 [2022-11-19 07:47:40,144 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 [2022-11-19 07:47:40,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,151 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 27 treesize of output 11 [2022-11-19 07:47:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:40,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:40,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:40,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,293 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:40,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:40,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,342 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 7 treesize of output 3 [2022-11-19 07:47:40,351 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 7 treesize of output 3 [2022-11-19 07:47:40,359 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 7 treesize of output 3 [2022-11-19 07:47:40,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,382 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:40,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:40,408 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 7 treesize of output 3 [2022-11-19 07:47:40,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,429 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 7 treesize of output 3 [2022-11-19 07:47:40,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,455 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 7 treesize of output 3 [2022-11-19 07:47:40,492 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 19 treesize of output 11 [2022-11-19 07:47:40,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:40,503 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 23 treesize of output 11 [2022-11-19 07:47:40,522 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 11 [2022-11-19 07:47:40,653 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:40,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-19 07:47:40,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,856 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 7 treesize of output 3 [2022-11-19 07:47:40,867 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 7 treesize of output 3 [2022-11-19 07:47:40,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:40,885 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 7 treesize of output 3 [2022-11-19 07:47:40,899 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:40,901 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:40,903 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:40,905 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:40,985 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:40,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-19 07:47:41,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,126 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 7 treesize of output 3 [2022-11-19 07:47:41,135 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 7 treesize of output 3 [2022-11-19 07:47:41,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,158 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 7 treesize of output 3 [2022-11-19 07:47:41,172 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,182 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,185 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,187 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,247 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 11 [2022-11-19 07:47:41,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:41,259 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 23 treesize of output 11 [2022-11-19 07:47:41,271 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 19 treesize of output 11 [2022-11-19 07:47:41,371 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:41,371 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-19 07:47:41,535 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 7 treesize of output 3 [2022-11-19 07:47:41,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,553 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 7 treesize of output 3 [2022-11-19 07:47:41,564 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 7 treesize of output 3 [2022-11-19 07:47:41,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,590 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,592 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,593 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,595 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,597 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,677 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:41,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-19 07:47:41,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,787 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 7 treesize of output 3 [2022-11-19 07:47:41,798 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 7 treesize of output 3 [2022-11-19 07:47:41,813 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 7 treesize of output 3 [2022-11-19 07:47:41,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:41,840 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,853 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,855 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,857 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,859 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:41,955 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:47:41,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-19 07:47:42,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 07:47:42,102 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:42,103 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:42,126 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:42,127 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:42,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:42,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:42,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:42,502 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-19 07:47:42,727 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:53,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4447#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (<= (+ |ULTIMATE.start_sll_circular_remove_first_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_remove_first_~last~1#1.base|))) (not (<= 0 |ULTIMATE.start_sll_circular_remove_first_~last~1#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-19 07:47:53,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:53,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:53,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2022-11-19 07:47:53,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572155751] [2022-11-19 07:47:53,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:53,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:47:53,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:53,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:47:53,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3522, Unknown=1, NotChecked=120, Total=3906 [2022-11-19 07:47:53,752 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:47:55,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:55,758 INFO L93 Difference]: Finished difference Result 168 states and 191 transitions. [2022-11-19 07:47:55,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 07:47:55,759 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-19 07:47:55,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:55,760 INFO L225 Difference]: With dead ends: 168 [2022-11-19 07:47:55,760 INFO L226 Difference]: Without dead ends: 168 [2022-11-19 07:47:55,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=376, Invalid=5028, Unknown=2, NotChecked=144, Total=5550 [2022-11-19 07:47:55,762 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 141 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1454 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:55,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1528 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1454 Invalid, 0 Unknown, 60 Unchecked, 1.0s Time] [2022-11-19 07:47:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-19 07:47:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 97. [2022-11-19 07:47:55,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 92 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:47:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-19 07:47:55,767 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 30 [2022-11-19 07:47:55,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:55,767 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-19 07:47:55,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:47:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-19 07:47:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:47:55,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:55,769 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 07:47:55,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:55,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:55,975 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:55,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:55,976 INFO L85 PathProgramCache]: Analyzing trace with hash 138181247, now seen corresponding path program 1 times [2022-11-19 07:47:55,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:55,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645255467] [2022-11-19 07:47:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:55,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:56,250 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:56,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645255467] [2022-11-19 07:47:56,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645255467] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:56,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:56,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 07:47:56,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392158788] [2022-11-19 07:47:56,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:56,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:47:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:56,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:47:56,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:47:56,252 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:56,507 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-11-19 07:47:56,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 07:47:56,508 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-11-19 07:47:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:56,508 INFO L225 Difference]: With dead ends: 106 [2022-11-19 07:47:56,509 INFO L226 Difference]: Without dead ends: 106 [2022-11-19 07:47:56,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-19 07:47:56,509 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 45 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:56,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 222 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:47:56,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-19 07:47:56,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-11-19 07:47:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:47:56,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2022-11-19 07:47:56,516 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 31 [2022-11-19 07:47:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:56,517 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2022-11-19 07:47:56,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 07:47:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2022-11-19 07:47:56,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 07:47:56,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:56,518 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2022-11-19 07:47:56,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:47:56,518 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:47:56,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:56,519 INFO L85 PathProgramCache]: Analyzing trace with hash 232644114, now seen corresponding path program 1 times [2022-11-19 07:47:56,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:56,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831575879] [2022-11-19 07:47:56,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:56,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:56,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:47:56,614 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:56,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831575879] [2022-11-19 07:47:56,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831575879] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449185546] [2022-11-19 07:47:56,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:56,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:56,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:56,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:56,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:47:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:56,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 07:47:56,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:56,825 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 [2022-11-19 07:47:56,939 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:56,939 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 [2022-11-19 07:47:56,991 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 11 treesize of output 7 [2022-11-19 07:47:57,037 INFO L321 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-19 07:47:57,037 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 39 treesize of output 38 [2022-11-19 07:47:57,093 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 20 [2022-11-19 07:47:57,173 INFO L321 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-19 07:47:57,173 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2022-11-19 07:47:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:57,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:57,303 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 38 treesize of output 30 [2022-11-19 07:47:57,311 WARN L837 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1171 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1171))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse1)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2022-11-19 07:47:57,325 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:57,326 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 69 treesize of output 45 [2022-11-19 07:47:57,372 INFO L321 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-19 07:47:57,373 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 6 case distinctions, treesize of input 121 treesize of output 129 [2022-11-19 07:47:57,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 07:47:57,386 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 102 treesize of output 92 [2022-11-19 07:47:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:47:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449185546] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:47:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1114182681] [2022-11-19 07:47:57,915 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-19 07:47:57,916 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:57,916 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:57,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:57,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,938 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 [2022-11-19 07:47:57,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:57,976 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 [2022-11-19 07:47:57,980 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 [2022-11-19 07:47:57,987 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 11 treesize of output 7 [2022-11-19 07:47:57,991 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 11 treesize of output 7 [2022-11-19 07:47:57,996 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 15 treesize of output 1 [2022-11-19 07:47:58,003 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 [2022-11-19 07:47:58,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,010 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 27 treesize of output 11 [2022-11-19 07:47:58,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,016 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 27 treesize of output 11 [2022-11-19 07:47:58,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:58,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:47:58,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:47:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,141 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:58,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:58,169 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 7 treesize of output 3 [2022-11-19 07:47:58,179 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 7 treesize of output 3 [2022-11-19 07:47:58,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,208 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 7 treesize of output 3 [2022-11-19 07:47:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,233 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:58,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:58,260 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 7 treesize of output 3 [2022-11-19 07:47:58,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,290 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 7 treesize of output 3 [2022-11-19 07:47:58,300 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 7 treesize of output 3 [2022-11-19 07:47:58,340 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 19 treesize of output 11 [2022-11-19 07:47:58,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,351 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 23 treesize of output 11 [2022-11-19 07:47:58,367 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 11 [2022-11-19 07:47:58,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,428 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:58,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:58,459 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 7 treesize of output 3 [2022-11-19 07:47:58,471 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 7 treesize of output 3 [2022-11-19 07:47:58,482 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 7 treesize of output 3 [2022-11-19 07:47:58,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,525 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:47:58,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:47:58,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,567 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 7 treesize of output 3 [2022-11-19 07:47:58,575 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 7 treesize of output 3 [2022-11-19 07:47:58,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:47:58,600 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 7 treesize of output 3 [2022-11-19 07:47:58,657 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 11 [2022-11-19 07:47:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,669 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 23 treesize of output 11 [2022-11-19 07:47:58,678 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 19 treesize of output 11 [2022-11-19 07:47:58,743 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:58,743 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:58,770 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:58,770 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 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-19 07:47:58,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-19 07:47:58,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:59,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:59,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-11-19 07:47:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,081 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-19 07:47:59,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 81 [2022-11-19 07:47:59,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,110 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-19 07:47:59,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 64 [2022-11-19 07:47:59,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:59,134 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 23 treesize of output 11 [2022-11-19 07:47:59,542 INFO L321 Elim1Store]: treesize reduction 290, result has 10.2 percent of original size [2022-11-19 07:47:59,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 613 treesize of output 618 [2022-11-19 07:48:01,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,330 INFO L321 Elim1Store]: treesize reduction 275, result has 8.3 percent of original size [2022-11-19 07:48:01,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 2746 treesize of output 2341 [2022-11-19 07:48:01,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:01,474 INFO L321 Elim1Store]: treesize reduction 249, result has 5.7 percent of original size [2022-11-19 07:48:01,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 2449 treesize of output 2082 [2022-11-19 07:48:01,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:01,548 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 2133 treesize of output 2085 [2022-11-19 07:48:04,898 INFO L321 Elim1Store]: treesize reduction 294, result has 9.0 percent of original size [2022-11-19 07:48:04,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 613 treesize of output 614 [2022-11-19 07:48:05,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,593 INFO L321 Elim1Store]: treesize reduction 275, result has 8.3 percent of original size [2022-11-19 07:48:05,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 1123 treesize of output 970 [2022-11-19 07:48:05,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:48:05,713 INFO L321 Elim1Store]: treesize reduction 246, result has 6.8 percent of original size [2022-11-19 07:48:05,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 1003 treesize of output 867 [2022-11-19 07:48:05,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:05,746 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 895 treesize of output 871 [2022-11-19 07:48:06,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:06,646 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:48:06,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:48:06,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:48:06,685 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 7 treesize of output 3 [2022-11-19 07:48:06,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:48:06,707 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 7 treesize of output 3 [2022-11-19 07:48:06,720 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 7 treesize of output 3 [2022-11-19 07:48:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:06,744 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:48:06,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:48:06,773 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 7 treesize of output 3 [2022-11-19 07:48:06,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:48:06,799 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 7 treesize of output 3 [2022-11-19 07:48:06,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:48:06,819 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 7 treesize of output 3 [2022-11-19 07:48:06,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:06,905 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:48:06,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-19 07:48:06,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:06,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:06,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:48:06,945 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 89 for LOIs [2022-11-19 07:48:07,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:21,416 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5202#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:48:21,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:21,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:48:21,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 18, 17] total 33 [2022-11-19 07:48:21,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491453507] [2022-11-19 07:48:21,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-19 07:48:21,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-19 07:48:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2561, Unknown=2, NotChecked=102, Total=2862 [2022-11-19 07:48:21,419 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:48:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:22,343 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2022-11-19 07:48:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-19 07:48:22,347 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2022-11-19 07:48:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:22,347 INFO L225 Difference]: With dead ends: 101 [2022-11-19 07:48:22,348 INFO L226 Difference]: Without dead ends: 101 [2022-11-19 07:48:22,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=309, Invalid=3725, Unknown=2, NotChecked=124, Total=4160 [2022-11-19 07:48:22,349 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 122 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:48:22,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 498 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 735 Invalid, 0 Unknown, 151 Unchecked, 0.4s Time] [2022-11-19 07:48:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-19 07:48:22,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-11-19 07:48:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 95 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:48:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 114 transitions. [2022-11-19 07:48:22,354 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 114 transitions. Word has length 32 [2022-11-19 07:48:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:22,354 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 114 transitions. [2022-11-19 07:48:22,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-19 07:48:22,355 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 114 transitions. [2022-11-19 07:48:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:48:22,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:22,355 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:48:22,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:48:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:22,563 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:48:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1099455537, now seen corresponding path program 2 times [2022-11-19 07:48:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821270658] [2022-11-19 07:48:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:22,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:23,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:23,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821270658] [2022-11-19 07:48:23,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821270658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:23,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860109695] [2022-11-19 07:48:23,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:48:23,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:23,404 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:23,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:48:23,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:48:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:48:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-19 07:48:23,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:23,776 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 [2022-11-19 07:48:24,028 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 07:48:24,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 07:48:24,157 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 11 treesize of output 7 [2022-11-19 07:48:24,164 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 11 treesize of output 7 [2022-11-19 07:48:24,280 INFO L321 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-19 07:48:24,280 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 88 treesize of output 50 [2022-11-19 07:48:24,290 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 39 treesize of output 30 [2022-11-19 07:48:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:24,803 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-19 07:48:24,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 30 [2022-11-19 07:48:24,941 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:48:24,941 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2022-11-19 07:48:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:24,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:48:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:26,228 INFO L321 Elim1Store]: treesize reduction 1840, result has 46.1 percent of original size [2022-11-19 07:48:26,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 15343 treesize of output 12973 [2022-11-19 07:48:27,308 INFO L321 Elim1Store]: treesize reduction 198, result has 55.2 percent of original size [2022-11-19 07:48:27,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 203091 treesize of output 181922 [2022-11-19 07:48:38,114 WARN L233 SmtUtils]: Spent 10.80s on a formula simplification. DAG size of input: 1585 DAG size of output: 1569 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:56:46,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860109695] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:46,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [184607900] [2022-11-19 07:56:46,613 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-19 07:56:46,614 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:56:46,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:56:46,614 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:56:46,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:56:46,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,633 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 [2022-11-19 07:56:46,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:56:46,681 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 [2022-11-19 07:56:46,689 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 [2022-11-19 07:56:46,698 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 15 treesize of output 1 [2022-11-19 07:56:46,703 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 11 treesize of output 7 [2022-11-19 07:56:46,708 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 11 treesize of output 7 [2022-11-19 07:56:46,716 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 [2022-11-19 07:56:46,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,722 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 27 treesize of output 11 [2022-11-19 07:56:46,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,729 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 27 treesize of output 11 [2022-11-19 07:56:46,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:56:46,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:56:46,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:46,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 16 treesize of output 10 [2022-11-19 07:56:46,884 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:56:46,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:56:47,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:56:47,024 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 7 treesize of output 3 [2022-11-19 07:56:47,033 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 7 treesize of output 3 [2022-11-19 07:56:47,047 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 7 treesize of output 3 [2022-11-19 07:56:47,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:56:47,071 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,072 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,075 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,076 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,078 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,127 INFO L321 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-19 07:56:47,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-19 07:56:47,245 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 7 treesize of output 3 [2022-11-19 07:56:47,253 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 7 treesize of output 3 [2022-11-19 07:56:47,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:56:47,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-19 07:56:47,282 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 7 treesize of output 3 [2022-11-19 07:56:47,294 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,296 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,297 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,299 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,301 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:56:47,339 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 19 treesize of output 11 [2022-11-19 07:56:47,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:47,354 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 23 treesize of output 11 [2022-11-19 07:56:47,364 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 11 [2022-11-19 07:56:47,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:47,512 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 133 treesize of output 117 [2022-11-19 07:56:47,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:56:47,523 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 129 treesize of output 117 [2022-11-19 07:56:47,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:56:47,534 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 121 treesize of output 109 [2022-11-19 07:56:47,735 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 [2022-11-19 07:56:47,745 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 [2022-11-19 07:56:47,755 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 [2022-11-19 07:56:48,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:48,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:48,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-19 07:56:48,075 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-19 07:56:48,245 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:56:54,459 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5645#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~last~1#1.base|) 1)) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:56:54,459 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:56:54,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:56:54,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-11-19 07:56:54,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651741700] [2022-11-19 07:56:54,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:56:54,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:56:54,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:56:54,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:56:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=3389, Unknown=1, NotChecked=0, Total=3660 [2022-11-19 07:56:54,462 INFO L87 Difference]: Start difference. First operand 100 states and 114 transitions. Second operand has 35 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:56:55,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:56:55,484 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-11-19 07:56:55,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-19 07:56:55,484 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2022-11-19 07:56:55,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:56:55,485 INFO L225 Difference]: With dead ends: 112 [2022-11-19 07:56:55,485 INFO L226 Difference]: Without dead ends: 112 [2022-11-19 07:56:55,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=333, Invalid=3956, Unknown=1, NotChecked=0, Total=4290 [2022-11-19 07:56:55,487 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 73 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:56:55,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 681 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 880 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2022-11-19 07:56:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-19 07:56:55,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2022-11-19 07:56:55,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.3214285714285714) internal successors, (111), 97 states have internal predecessors, (111), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 07:56:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2022-11-19 07:56:55,491 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 34 [2022-11-19 07:56:55,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:56:55,492 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2022-11-19 07:56:55,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 30 states have internal predecessors, (60), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 07:56:55,492 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2022-11-19 07:56:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 07:56:55,493 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:56:55,493 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:56:55,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-19 07:56:55,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:56:55,699 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-19 07:56:55,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:56:55,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1099455538, now seen corresponding path program 2 times [2022-11-19 07:56:55,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:56:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822710965] [2022-11-19 07:56:55,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:56:55,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:56:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:56:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:56,620 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:56:56,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822710965] [2022-11-19 07:56:56,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822710965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:56:56,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761927120] [2022-11-19 07:56:56,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:56:56,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:56:56,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:56:56,623 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:56:56,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_084b64f3-ee3a-4677-ae3a-f8150a1e03f5/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:56:56,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:56:56,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:56:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-19 07:56:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:56:57,004 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 [2022-11-19 07:56:57,253 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 07:56:57,254 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 [2022-11-19 07:56:57,364 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 11 treesize of output 7 [2022-11-19 07:56:57,373 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 11 treesize of output 7 [2022-11-19 07:56:57,451 INFO L321 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-19 07:56:57,451 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 75 treesize of output 45 [2022-11-19 07:56:57,461 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 39 treesize of output 30 [2022-11-19 07:56:58,074 INFO L321 Elim1Store]: treesize reduction 85, result has 11.5 percent of original size [2022-11-19 07:56:58,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 106 treesize of output 58 [2022-11-19 07:56:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:56:58,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:56:58,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:56:59,350 INFO L321 Elim1Store]: treesize reduction 1963, result has 42.5 percent of original size [2022-11-19 07:56:59,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 15 new quantified variables, introduced 55 case distinctions, treesize of input 14744 treesize of output 12163 [2022-11-19 07:57:00,259 INFO L321 Elim1Store]: treesize reduction 220, result has 50.2 percent of original size [2022-11-19 07:57:00,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 11 new quantified variables, introduced 45 case distinctions, treesize of input 131021 treesize of output 116718 [2022-11-19 07:57:06,811 WARN L233 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 1489 DAG size of output: 1471 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)