./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/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_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 --- 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 06:37:05,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:37:05,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:37:05,887 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:37:05,888 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:37:05,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:37:05,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:37:05,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:37:05,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:37:05,908 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:37:05,909 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:37:05,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:37:05,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:37:05,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:37:05,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:37:05,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:37:05,919 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:37:05,920 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:37:05,922 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:37:05,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:37:05,931 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:37:05,932 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:37:05,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:37:05,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:37:05,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:37:05,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:37:05,947 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:37:05,948 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:37:05,949 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:37:05,952 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:37:05,952 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:37:05,953 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:37:05,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:37:05,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:37:05,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:37:05,959 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:37:05,960 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:37:05,960 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:37:05,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:37:05,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:37:05,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:37:05,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:37:06,002 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:37:06,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:37:06,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:37:06,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:37:06,005 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:37:06,005 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:37:06,006 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:37:06,006 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:37:06,006 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:37:06,007 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:37:06,008 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:37:06,008 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:37:06,008 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:37:06,009 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:37:06,009 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:37:06,009 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:37:06,010 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:37:06,010 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:37:06,011 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:37:06,011 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:37:06,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:37:06,012 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:37:06,012 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:37:06,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:37:06,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:37:06,013 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:37:06,013 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:37:06,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:37:06,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:37:06,014 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:37:06,014 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:37:06,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:37:06,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:06,015 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:37:06,016 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:37:06,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:37:06,016 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:37:06,016 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:37:06,017 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:37:06,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:37:06,017 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:37:06,018 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_5524075d-e56a-44bd-9e74-a1f6cdad0a16/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4caa1f295436b297cae57f4102149db941e37f67b5d377cc8e9aa7b58bbf9350 [2022-11-19 06:37:06,365 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:37:06,402 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:37:06,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:37:06,406 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:37:06,407 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:37:06,408 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-19 06:37:06,475 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/data/91c1e8d28/1c2d8dfab3ba4968a429da527a0634ff/FLAGd2cc69fd0 [2022-11-19 06:37:06,940 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:37:06,941 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c [2022-11-19 06:37:06,948 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/data/91c1e8d28/1c2d8dfab3ba4968a429da527a0634ff/FLAGd2cc69fd0 [2022-11-19 06:37:07,308 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/data/91c1e8d28/1c2d8dfab3ba4968a429da527a0634ff [2022-11-19 06:37:07,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:37:07,315 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:37:07,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:07,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:37:07,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:37:07,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,327 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32002fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07, skipping insertion in model container [2022-11-19 06:37:07,327 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,335 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:37:07,350 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:37:07,569 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_5524075d-e56a-44bd-9e74-a1f6cdad0a16/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-19 06:37:07,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:07,612 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:37:07,625 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_5524075d-e56a-44bd-9e74-a1f6cdad0a16/sv-benchmarks/c/array-cav19/array_init_pair_symmetr2.c[415,428] [2022-11-19 06:37:07,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:37:07,647 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:37:07,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07 WrapperNode [2022-11-19 06:37:07,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:37:07,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:07,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:37:07,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:37:07,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,663 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,683 INFO L138 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-19 06:37:07,684 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:37:07,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:37:07,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:37:07,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:37:07,694 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,697 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,708 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,711 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:37:07,712 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:37:07,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:37:07,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:37:07,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (1/1) ... [2022-11-19 06:37:07,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:37:07,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:07,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:37:07,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:37:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:37:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-19 06:37:07,801 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-19 06:37:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:37:07,801 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:37:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:37:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:37:07,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:37:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:37:07,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:37:07,875 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:37:07,877 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:37:08,087 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:37:08,161 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:37:08,161 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:37:08,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:08 BoogieIcfgContainer [2022-11-19 06:37:08,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:37:08,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:37:08,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:37:08,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:37:08,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:37:07" (1/3) ... [2022-11-19 06:37:08,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ab096d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:08, skipping insertion in model container [2022-11-19 06:37:08,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:37:07" (2/3) ... [2022-11-19 06:37:08,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70ab096d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:37:08, skipping insertion in model container [2022-11-19 06:37:08,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:37:08" (3/3) ... [2022-11-19 06:37:08,185 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_pair_symmetr2.c [2022-11-19 06:37:08,206 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:37:08,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:37:08,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:37:08,276 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@1377654d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:37:08,276 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:37:08,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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 06:37:08,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:37:08,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:08,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:37:08,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:08,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1033138693, now seen corresponding path program 1 times [2022-11-19 06:37:08,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:08,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448986473] [2022-11-19 06:37:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:08,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:08,701 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 06:37:08,701 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:08,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448986473] [2022-11-19 06:37:08,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448986473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:08,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:08,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:37:08,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134007858] [2022-11-19 06:37:08,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:08,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:37:08,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:08,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:37:08,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:37:08,739 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:08,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:08,799 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-19 06:37:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:37:08,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:37:08,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:08,809 INFO L225 Difference]: With dead ends: 27 [2022-11-19 06:37:08,810 INFO L226 Difference]: Without dead ends: 19 [2022-11-19 06:37:08,812 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 06:37:08,815 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:08,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:37:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-19 06:37:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2022-11-19 06:37:08,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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 06:37:08,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2022-11-19 06:37:08,849 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2022-11-19 06:37:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:08,849 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2022-11-19 06:37:08,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:37:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2022-11-19 06:37:08,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 06:37:08,851 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:08,851 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:08,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:37:08,852 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:08,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:08,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1201809854, now seen corresponding path program 1 times [2022-11-19 06:37:08,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:08,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046910537] [2022-11-19 06:37:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:08,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:37:09,150 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:09,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046910537] [2022-11-19 06:37:09,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046910537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:37:09,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:37:09,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:37:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990550963] [2022-11-19 06:37:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:37:09,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:37:09,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:09,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:37:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:37:09,154 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 06:37:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:09,211 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2022-11-19 06:37:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:37:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 17 [2022-11-19 06:37:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:09,213 INFO L225 Difference]: With dead ends: 25 [2022-11-19 06:37:09,213 INFO L226 Difference]: Without dead ends: 20 [2022-11-19 06:37:09,213 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 06:37:09,215 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:09,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:37:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-19 06:37:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2022-11-19 06:37:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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 06:37:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-11-19 06:37:09,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 17 [2022-11-19 06:37:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:09,226 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-11-19 06:37:09,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-19 06:37:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-11-19 06:37:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:37:09,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:09,227 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:37:09,228 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1407331851, now seen corresponding path program 1 times [2022-11-19 06:37:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:09,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290142133] [2022-11-19 06:37:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:09,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:09,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:37:09,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:09,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290142133] [2022-11-19 06:37:09,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290142133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:09,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446070540] [2022-11-19 06:37:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:09,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:09,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:09,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:37:09,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:09,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:37:09,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:37:09,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:37:09,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446070540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:09,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [753019499] [2022-11-19 06:37:09,724 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:37:09,725 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:09,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:09,735 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:09,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:09,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:09,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,028 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:37:10,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:37:10,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:37:10,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:10,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:37:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:14,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:14,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:14,575 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:37:14,576 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-19 06:37:18,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:18,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:18,991 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:18,992 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:19,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:19,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,235 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:19,236 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:19,318 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-19 06:37:19,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-19 06:37:19,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:19,395 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:19,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:19,487 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-19 06:37:19,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:20,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '262#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:37:20,062 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:20,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:37:20,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-11-19 06:37:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991270523] [2022-11-19 06:37:20,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:20,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:37:20,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:20,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:37:20,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2022-11-19 06:37:20,065 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:37:20,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:20,259 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2022-11-19 06:37:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:37:20,259 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 18 [2022-11-19 06:37:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:20,264 INFO L225 Difference]: With dead ends: 52 [2022-11-19 06:37:20,264 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 06:37:20,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-11-19 06:37:20,272 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:20,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 18 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:37:20,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 06:37:20,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2022-11-19 06:37:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 06:37:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 47 transitions. [2022-11-19 06:37:20,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 47 transitions. Word has length 18 [2022-11-19 06:37:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:20,282 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 47 transitions. [2022-11-19 06:37:20,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 06:37:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 47 transitions. [2022-11-19 06:37:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 06:37:20,284 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:20,285 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:20,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:20,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:20,490 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2143827323, now seen corresponding path program 2 times [2022-11-19 06:37:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:20,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175443223] [2022-11-19 06:37:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:20,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:20,787 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-11-19 06:37:20,788 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:20,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175443223] [2022-11-19 06:37:20,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175443223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:20,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835177651] [2022-11-19 06:37:20,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:37:20,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:20,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:20,790 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:20,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:37:20,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 06:37:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:20,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-19 06:37:20,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-19 06:37:21,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:21,175 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-11-19 06:37:21,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835177651] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:21,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [269364862] [2022-11-19 06:37:21,183 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:37:21,183 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:21,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:21,184 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:21,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:21,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,298 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-19 06:37:21,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-19 06:37:21,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,437 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:37:21,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:37:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:21,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:37:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:24,399 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:37:24,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-19 06:37:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,437 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:27,438 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:27,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,695 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:27,695 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:27,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,793 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:27,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:27,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:27,863 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:27,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:27,965 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-19 06:37:27,967 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:28,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '753#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:37:28,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:28,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:37:28,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 19 [2022-11-19 06:37:28,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941569450] [2022-11-19 06:37:28,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:28,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:37:28,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:37:28,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:37:28,626 INFO L87 Difference]: Start difference. First operand 34 states and 47 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-19 06:37:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:29,087 INFO L93 Difference]: Finished difference Result 121 states and 165 transitions. [2022-11-19 06:37:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 06:37:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 54 [2022-11-19 06:37:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:29,089 INFO L225 Difference]: With dead ends: 121 [2022-11-19 06:37:29,089 INFO L226 Difference]: Without dead ends: 111 [2022-11-19 06:37:29,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=781, Unknown=0, NotChecked=0, Total=1122 [2022-11-19 06:37:29,091 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 203 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:29,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 42 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:37:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-19 06:37:29,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 70. [2022-11-19 06:37:29,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 30 states have call successors, (30), 1 states have call predecessors, (30), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 06:37:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 101 transitions. [2022-11-19 06:37:29,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 101 transitions. Word has length 54 [2022-11-19 06:37:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:29,111 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 101 transitions. [2022-11-19 06:37:29,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-11-19 06:37:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 101 transitions. [2022-11-19 06:37:29,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-19 06:37:29,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:29,115 INFO L195 NwaCegarLoop]: trace histogram [30, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:29,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:29,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:29,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:29,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1580456123, now seen corresponding path program 3 times [2022-11-19 06:37:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804328556] [2022-11-19 06:37:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:29,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-19 06:37:30,079 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804328556] [2022-11-19 06:37:30,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804328556] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:30,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950924436] [2022-11-19 06:37:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:37:30,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:30,082 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:30,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:37:31,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:37:31,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:37:31,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-19 06:37:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-19 06:37:32,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2022-11-19 06:37:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950924436] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:32,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780297054] [2022-11-19 06:37:32,739 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:37:32,739 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:32,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:32,740 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:32,740 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,878 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:37:32,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:37:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:32,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 18 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 52 [2022-11-19 06:37:33,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:33,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-19 06:37:35,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:35,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:35,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:35,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:35,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:35,652 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-19 06:37:35,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 623 treesize of output 537 [2022-11-19 06:37:36,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:36,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:36,852 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:36,852 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:37,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:37,535 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:37,535 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:37,614 INFO L321 Elim1Store]: treesize reduction 28, result has 52.5 percent of original size [2022-11-19 06:37:37,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 40 [2022-11-19 06:37:37,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:37,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:37,688 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:37,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:37,911 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-19 06:37:37,927 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:38,887 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1873#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:37:38,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:38,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:37:38,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2022-11-19 06:37:38,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11463371] [2022-11-19 06:37:38,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:38,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 06:37:38,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:38,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 06:37:38,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=1359, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:37:38,891 INFO L87 Difference]: Start difference. First operand 70 states and 101 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-19 06:37:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:39,864 INFO L93 Difference]: Finished difference Result 259 states and 351 transitions. [2022-11-19 06:37:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-19 06:37:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) Word has length 126 [2022-11-19 06:37:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:39,876 INFO L225 Difference]: With dead ends: 259 [2022-11-19 06:37:39,876 INFO L226 Difference]: Without dead ends: 243 [2022-11-19 06:37:39,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 334 SyntacticMatches, 11 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2072 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1031, Invalid=2161, Unknown=0, NotChecked=0, Total=3192 [2022-11-19 06:37:39,878 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 490 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:39,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 84 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 06:37:39,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-19 06:37:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 142. [2022-11-19 06:37:39,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2022-11-19 06:37:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 209 transitions. [2022-11-19 06:37:39,907 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 209 transitions. Word has length 126 [2022-11-19 06:37:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:39,908 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 209 transitions. [2022-11-19 06:37:39,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 30 states have call successors, (90), 2 states have call predecessors, (90), 2 states have return successors, (90), 30 states have call predecessors, (90), 30 states have call successors, (90) [2022-11-19 06:37:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 209 transitions. [2022-11-19 06:37:39,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-11-19 06:37:39,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:39,916 INFO L195 NwaCegarLoop]: trace histogram [66, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:39,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 06:37:40,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:40,126 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:40,126 INFO L85 PathProgramCache]: Analyzing trace with hash 81571643, now seen corresponding path program 4 times [2022-11-19 06:37:40,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474545201] [2022-11-19 06:37:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:40,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:42,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-19 06:37:42,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:37:42,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474545201] [2022-11-19 06:37:42,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474545201] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:37:42,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616894155] [2022-11-19 06:37:42,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:37:42,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:37:42,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:37:42,151 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:37:42,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:37:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:37:42,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-19 06:37:42,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:37:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-19 06:37:43,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:37:44,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5720 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 4543 trivial. 0 not checked. [2022-11-19 06:37:44,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616894155] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:37:44,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [610555541] [2022-11-19 06:37:44,667 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:37:44,667 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:37:44,668 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:37:44,668 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:37:44,668 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:37:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,775 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-19 06:37:44,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-19 06:37:44,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:44,900 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:37:44,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:37:45,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:45,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:45,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:45,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:37:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:47,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:47,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:47,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:47,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:47,418 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:37:47,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-19 06:37:51,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:51,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:51,349 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:51,354 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:37:52,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,074 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:37:52,075 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:37:52,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,158 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:52,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:52,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:37:52,227 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:37:52,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:37:52,442 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 36 for LOIs [2022-11-19 06:37:52,451 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:37:54,085 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4253#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:37:54,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:37:54,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:37:54,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 72 [2022-11-19 06:37:54,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290823006] [2022-11-19 06:37:54,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:37:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-19 06:37:54,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:37:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-19 06:37:54,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2535, Invalid=4107, Unknown=0, NotChecked=0, Total=6642 [2022-11-19 06:37:54,093 INFO L87 Difference]: Start difference. First operand 142 states and 209 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-19 06:37:56,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:37:56,624 INFO L93 Difference]: Finished difference Result 535 states and 723 transitions. [2022-11-19 06:37:56,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-19 06:37:56,625 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) Word has length 270 [2022-11-19 06:37:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:37:56,629 INFO L225 Difference]: With dead ends: 535 [2022-11-19 06:37:56,629 INFO L226 Difference]: Without dead ends: 507 [2022-11-19 06:37:56,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 856 GetRequests, 730 SyntacticMatches, 23 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7352 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3755, Invalid=7165, Unknown=0, NotChecked=0, Total=10920 [2022-11-19 06:37:56,634 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1248 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 740 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 740 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:37:56,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 174 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [740 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 06:37:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-19 06:37:56,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 286. [2022-11-19 06:37:56,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 138 states have call successors, (138), 1 states have call predecessors, (138), 1 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2022-11-19 06:37:56,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 425 transitions. [2022-11-19 06:37:56,682 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 425 transitions. Word has length 270 [2022-11-19 06:37:56,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:37:56,683 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 425 transitions. [2022-11-19 06:37:56,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 66 states have call successors, (198), 2 states have call predecessors, (198), 2 states have return successors, (198), 66 states have call predecessors, (198), 66 states have call successors, (198) [2022-11-19 06:37:56,684 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 425 transitions. [2022-11-19 06:37:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 559 [2022-11-19 06:37:56,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:37:56,698 INFO L195 NwaCegarLoop]: trace histogram [138, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-11-19 06:37:56,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:37:56,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:37:56,906 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:37:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:37:56,906 INFO L85 PathProgramCache]: Analyzing trace with hash -117138373, now seen corresponding path program 5 times [2022-11-19 06:37:56,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:37:56,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608976881] [2022-11-19 06:37:56,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:37:56,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:37:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:02,769 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 19987 trivial. 0 not checked. [2022-11-19 06:38:02,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608976881] [2022-11-19 06:38:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608976881] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653629641] [2022-11-19 06:38:02,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:38:02,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:02,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:02,770 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:02,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:40:10,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-11-19 06:40:10,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:40:10,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-19 06:40:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:40:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 226 proven. 1081 refuted. 0 times theorem prover too weak. 23901 trivial. 0 not checked. [2022-11-19 06:40:13,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:40:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 25208 backedges. 0 proven. 1352 refuted. 0 times theorem prover too weak. 23856 trivial. 0 not checked. [2022-11-19 06:40:17,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653629641] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:40:17,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2074052246] [2022-11-19 06:40:17,388 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2022-11-19 06:40:17,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:40:17,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:40:17,389 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:40:17,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:40:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,513 INFO L321 Elim1Store]: treesize reduction 158, result has 23.7 percent of original size [2022-11-19 06:40:17,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 9 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 72 [2022-11-19 06:40:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,644 INFO L321 Elim1Store]: treesize reduction 190, result has 19.1 percent of original size [2022-11-19 06:40:17,645 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 12 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 93 [2022-11-19 06:40:17,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:17,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-19 06:40:20,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:20,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:20,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:20,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:20,230 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 06:40:20,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 573 treesize of output 539 [2022-11-19 06:40:22,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:22,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:22,965 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:40:22,965 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:40:23,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:40:23,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:23,162 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 06:40:23,163 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 06:40:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:23,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:23,237 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:23,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:40:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:23,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:40:23,299 INFO L321 Elim1Store]: treesize reduction 38, result has 51.9 percent of original size [2022-11-19 06:40:23,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 55 [2022-11-19 06:40:23,393 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 11 for LOIs [2022-11-19 06:40:23,394 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:40:26,741 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9159#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= (select (select |#memory_int| |ULTIMATE.start_main_~#c~0#1.base|) (+ |ULTIMATE.start_main_~#c~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (<= 0 |ULTIMATE.start_main_~#c~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (< 0 |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~#c~0#1.offset| 0) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-19 06:40:26,741 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:40:26,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:40:26,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 51, 53] total 150 [2022-11-19 06:40:26,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966193878] [2022-11-19 06:40:26,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:40:26,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-11-19 06:40:26,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:40:26,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-11-19 06:40:26,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10283, Invalid=15157, Unknown=0, NotChecked=0, Total=25440 [2022-11-19 06:40:26,754 INFO L87 Difference]: Start difference. First operand 286 states and 425 transitions. Second operand has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-19 06:40:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:40:37,682 INFO L93 Difference]: Finished difference Result 1087 states and 1467 transitions. [2022-11-19 06:40:37,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 06:40:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) Word has length 558 [2022-11-19 06:40:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:40:37,690 INFO L225 Difference]: With dead ends: 1087 [2022-11-19 06:40:37,690 INFO L226 Difference]: Without dead ends: 1035 [2022-11-19 06:40:37,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 1516 SyntacticMatches, 47 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29021 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=15205, Invalid=27025, Unknown=0, NotChecked=0, Total=42230 [2022-11-19 06:40:37,702 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2660 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 3605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2798 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3605 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-19 06:40:37,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2798 Valid, 375 Invalid, 6294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3605 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-19 06:40:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-11-19 06:40:37,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 574. [2022-11-19 06:40:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 282 states have call successors, (282), 1 states have call predecessors, (282), 1 states have return successors, (282), 282 states have call predecessors, (282), 282 states have call successors, (282) [2022-11-19 06:40:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 857 transitions. [2022-11-19 06:40:37,791 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 857 transitions. Word has length 558 [2022-11-19 06:40:37,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:40:37,793 INFO L495 AbstractCegarLoop]: Abstraction has 574 states and 857 transitions. [2022-11-19 06:40:37,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.3866666666666667) internal successors, (208), 150 states have internal predecessors, (208), 50 states have call successors, (150), 2 states have call predecessors, (150), 2 states have return successors, (150), 50 states have call predecessors, (150), 50 states have call successors, (150) [2022-11-19 06:40:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 857 transitions. [2022-11-19 06:40:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1135 [2022-11-19 06:40:37,856 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:40:37,856 INFO L195 NwaCegarLoop]: trace histogram [282, 94, 94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-11-19 06:40:37,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:40:38,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:38,085 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:40:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:40:38,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1361933883, now seen corresponding path program 6 times [2022-11-19 06:40:38,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:40:38,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205844425] [2022-11-19 06:40:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:40:38,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:40:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:41:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 105656 backedges. 0 proven. 21949 refuted. 0 times theorem prover too weak. 83707 trivial. 0 not checked. [2022-11-19 06:41:00,434 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:41:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205844425] [2022-11-19 06:41:00,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205844425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:41:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477059736] [2022-11-19 06:41:00,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:41:00,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:41:00,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:41:00,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:41:00,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5524075d-e56a-44bd-9e74-a1f6cdad0a16/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process