./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome1-2.i --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_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/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_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/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_027120e4-9354-46ff-9060-05344dce6bf8/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 fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 07:05:03,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:05:03,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:05:03,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:05:03,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:05:03,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:05:03,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:05:03,896 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:05:03,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:05:03,906 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:05:03,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:05:03,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:05:03,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:05:03,913 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:05:03,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:05:03,915 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:05:03,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:05:03,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:05:03,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:05:03,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:05:03,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:05:03,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:05:03,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:05:03,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:05:03,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:05:03,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:05:03,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:05:03,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:05:03,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:05:03,947 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:05:03,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:05:03,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:05:03,951 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:05:03,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:05:03,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:05:03,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:05:03,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:05:03,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:05:03,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:05:03,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:05:03,957 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:05:03,958 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:05:03,997 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:05:03,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:05:03,998 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:05:03,998 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:05:03,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:05:03,999 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:05:04,000 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:05:04,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:05:04,001 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:05:04,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:05:04,002 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:05:04,003 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:05:04,003 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:05:04,003 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:05:04,003 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:05:04,004 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:05:04,004 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:05:04,004 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:05:04,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:05:04,005 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:05:04,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:05:04,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:05:04,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:05:04,008 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:05:04,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:05:04,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:05:04,009 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:05:04,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:05:04,009 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:05:04,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:05:04,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:05:04,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:05:04,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:05:04,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:05:04,011 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:05:04,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:05:04,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:05:04,012 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:05:04,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:05:04,013 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:05:04,013 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:05:04,013 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_027120e4-9354-46ff-9060-05344dce6bf8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fba7b7c813943ca4d863bf010df4d3f1a074ecd1ac1791c737a4b5fb8e2d7ea1 [2022-11-19 07:05:04,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:05:04,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:05:04,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:05:04,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:05:04,348 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:05:04,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-programs/copysome1-2.i [2022-11-19 07:05:04,417 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/data/900b71509/aa4734e028114d1ebcd7a29ecec23954/FLAG2db410b69 [2022-11-19 07:05:04,831 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:05:04,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/sv-benchmarks/c/array-programs/copysome1-2.i [2022-11-19 07:05:04,838 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/data/900b71509/aa4734e028114d1ebcd7a29ecec23954/FLAG2db410b69 [2022-11-19 07:05:05,215 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/data/900b71509/aa4734e028114d1ebcd7a29ecec23954 [2022-11-19 07:05:05,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:05:05,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:05:05,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:05:05,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:05:05,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:05:05,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4f2b87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05, skipping insertion in model container [2022-11-19 07:05:05,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:05:05,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:05:05,513 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_027120e4-9354-46ff-9060-05344dce6bf8/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2022-11-19 07:05:05,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:05:05,541 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:05:05,562 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_027120e4-9354-46ff-9060-05344dce6bf8/sv-benchmarks/c/array-programs/copysome1-2.i[805,818] [2022-11-19 07:05:05,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:05:05,598 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:05:05,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05 WrapperNode [2022-11-19 07:05:05,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:05:05,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:05:05,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:05:05,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:05:05,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,645 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2022-11-19 07:05:05,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:05:05,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:05:05,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:05:05,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:05:05,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,669 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,673 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,683 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,686 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:05:05,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:05:05,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:05:05,688 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:05:05,689 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (1/1) ... [2022-11-19 07:05:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:05:05,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:05,721 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:05:05,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:05:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:05:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:05:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:05:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 07:05:05,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:05:05,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:05:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 07:05:05,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:05:05,836 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:05:05,838 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:05:05,978 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:05:06,017 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:05:06,018 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 07:05:06,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:05:06 BoogieIcfgContainer [2022-11-19 07:05:06,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:05:06,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:05:06,023 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:05:06,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:05:06,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:05:05" (1/3) ... [2022-11-19 07:05:06,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e3577b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:05:06, skipping insertion in model container [2022-11-19 07:05:06,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:05:05" (2/3) ... [2022-11-19 07:05:06,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39e3577b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:05:06, skipping insertion in model container [2022-11-19 07:05:06,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:05:06" (3/3) ... [2022-11-19 07:05:06,030 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome1-2.i [2022-11-19 07:05:06,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:05:06,049 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:05:06,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:05:06,105 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;@a6ac388, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:05:06,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:05:06,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:06,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:05:06,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:06,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:06,117 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:06,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:06,123 INFO L85 PathProgramCache]: Analyzing trace with hash 716573771, now seen corresponding path program 1 times [2022-11-19 07:05:06,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:06,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850845851] [2022-11-19 07:05:06,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:06,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:06,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:06,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:05:06,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:06,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850845851] [2022-11-19 07:05:06,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850845851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:05:06,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:05:06,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:05:06,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810966903] [2022-11-19 07:05:06,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:05:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:05:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:06,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:05:06,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:06,381 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:06,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:06,461 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2022-11-19 07:05:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:05:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 07:05:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:06,472 INFO L225 Difference]: With dead ends: 22 [2022-11-19 07:05:06,473 INFO L226 Difference]: Without dead ends: 12 [2022-11-19 07:05:06,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:05:06,479 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:06,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-19 07:05:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-19 07:05:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-11-19 07:05:06,515 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-11-19 07:05:06,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:06,515 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-11-19 07:05:06,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:06,516 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-11-19 07:05:06,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 07:05:06,516 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:06,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:06,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:05:06,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:06,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:06,518 INFO L85 PathProgramCache]: Analyzing trace with hash 562122539, now seen corresponding path program 1 times [2022-11-19 07:05:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:06,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527496446] [2022-11-19 07:05:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:06,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:06,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:06,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527496446] [2022-11-19 07:05:06,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527496446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:06,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302049495] [2022-11-19 07:05:06,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:06,697 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:06,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:05:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:06,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:05:06,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:06,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:05:06,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302049495] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:06,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1550190377] [2022-11-19 07:05:06,881 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:05:06,881 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:06,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:06,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:06,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,102 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:05:07,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:05:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,213 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:05:07,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:05:07,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 07:05:07,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:07,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:07,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:07,569 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:07,676 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:05:07,677 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 290 treesize of output 280 [2022-11-19 07:05:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:08,188 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:05:08,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:05:08,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:08,254 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:08,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:08,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:08,331 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:08,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:08,375 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:08,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '118#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:08,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:08,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:08,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 07:05:08,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305243919] [2022-11-19 07:05:08,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:08,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:05:08,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:08,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:05:08,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:05:08,636 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:08,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:08,697 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2022-11-19 07:05:08,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:05:08,697 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-19 07:05:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:08,698 INFO L225 Difference]: With dead ends: 27 [2022-11-19 07:05:08,698 INFO L226 Difference]: Without dead ends: 18 [2022-11-19 07:05:08,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:05:08,700 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:08,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:05:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-19 07:05:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-19 07:05:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-19 07:05:08,706 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2022-11-19 07:05:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:08,706 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-19 07:05:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:08,707 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-19 07:05:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 07:05:08,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:08,708 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:08,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:08,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:08,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:08,915 INFO L85 PathProgramCache]: Analyzing trace with hash 792207947, now seen corresponding path program 2 times [2022-11-19 07:05:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:08,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952551674] [2022-11-19 07:05:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:08,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:05:09,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:09,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952551674] [2022-11-19 07:05:09,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952551674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:09,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052654826] [2022-11-19 07:05:09,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:05:09,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:09,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:09,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:09,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:05:09,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-19 07:05:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:05:09,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:05:09,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 07:05:09,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052654826] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:09,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [485747179] [2022-11-19 07:05:09,470 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:05:09,470 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:09,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:09,470 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:09,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:09,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,535 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:05:09,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:05:09,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,610 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:05:09,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:05:09,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 07:05:09,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:09,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:09,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:09,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:09,831 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:05:09,832 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 290 treesize of output 280 [2022-11-19 07:05:10,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:10,124 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:05:10,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:05:10,162 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:05:10,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:05:10,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:10,248 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-19 07:05:10,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 95 [2022-11-19 07:05:10,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:10,338 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:10,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:10,357 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:10,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '289#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:10,570 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:10,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:10,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-19 07:05:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427330637] [2022-11-19 07:05:10,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 07:05:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:10,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 07:05:10,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:05:10,572 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:10,662 INFO L93 Difference]: Finished difference Result 42 states and 59 transitions. [2022-11-19 07:05:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-19 07:05:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-19 07:05:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:10,665 INFO L225 Difference]: With dead ends: 42 [2022-11-19 07:05:10,665 INFO L226 Difference]: Without dead ends: 30 [2022-11-19 07:05:10,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:05:10,669 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:10,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-19 07:05:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-19 07:05:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 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 07:05:10,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-11-19 07:05:10,683 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 15 [2022-11-19 07:05:10,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-11-19 07:05:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-11-19 07:05:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:05:10,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:10,687 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:10,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:10,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:10,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1411416907, now seen corresponding path program 3 times [2022-11-19 07:05:10,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:10,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56265971] [2022-11-19 07:05:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:10,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:05:11,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:11,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56265971] [2022-11-19 07:05:11,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56265971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203054221] [2022-11-19 07:05:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 07:05:11,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:11,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:11,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:11,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:05:11,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 07:05:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 07:05:11,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-19 07:05:11,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:05:11,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:11,773 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 07:05:11,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203054221] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:11,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81820434] [2022-11-19 07:05:11,776 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:05:11,776 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:11,777 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:11,777 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:11,777 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:11,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,838 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 07:05:11,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 07:05:11,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,905 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:05:11,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:05:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:11,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 07:05:12,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:12,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:12,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,093 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:05:12,093 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 290 treesize of output 280 [2022-11-19 07:05:12,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,374 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:05:12,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:05:12,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,404 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:12,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:12,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:12,451 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:12,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:12,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:12,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '598#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:12,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:12,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:12,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-19 07:05:12,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905786265] [2022-11-19 07:05:12,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:12,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-19 07:05:12,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:12,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-19 07:05:12,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=501, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:05:12,976 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 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 07:05:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:13,139 INFO L93 Difference]: Finished difference Result 72 states and 101 transitions. [2022-11-19 07:05:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-19 07:05:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-19 07:05:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:13,141 INFO L225 Difference]: With dead ends: 72 [2022-11-19 07:05:13,141 INFO L226 Difference]: Without dead ends: 54 [2022-11-19 07:05:13,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=501, Unknown=0, NotChecked=0, Total=812 [2022-11-19 07:05:13,142 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:13,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:05:13,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-19 07:05:13,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-11-19 07:05:13,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 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 07:05:13,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-11-19 07:05:13,151 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 27 [2022-11-19 07:05:13,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:13,151 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-11-19 07:05:13,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 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 07:05:13,151 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-11-19 07:05:13,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 07:05:13,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:13,153 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:13,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:05:13,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:13,359 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:13,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash -866269877, now seen corresponding path program 4 times [2022-11-19 07:05:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:13,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439158011] [2022-11-19 07:05:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:14,361 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:05:14,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:14,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439158011] [2022-11-19 07:05:14,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439158011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:14,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135868117] [2022-11-19 07:05:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 07:05:14,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:14,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:14,388 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:05:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:14,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-19 07:05:14,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:05:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:05:14,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:05:15,503 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-19 07:05:15,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135868117] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:05:15,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803455847] [2022-11-19 07:05:15,506 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-19 07:05:15,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:05:15,506 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:05:15,506 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:05:15,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:05:15,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,568 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 07:05:15,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 07:05:15,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 07:05:15,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 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 07:05:15,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:05:15,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:15,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:15,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:15,774 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-19 07:05:15,774 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 290 treesize of output 280 [2022-11-19 07:05:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:16,046 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-19 07:05:16,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-19 07:05:16,074 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:05:16,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-19 07:05:16,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:16,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:16,172 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-19 07:05:16,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 105 [2022-11-19 07:05:16,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:05:16,262 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-19 07:05:16,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 07:05:16,282 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:05:16,526 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1183#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a2~0#1.base|) (+ |ULTIMATE.start_main_~#a2~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem8#1|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (= 150001 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem8#1| |ULTIMATE.start_main_#t~mem7#1|) 1 0)) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:05:16,526 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:05:16,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:05:16,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-19 07:05:16,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89810333] [2022-11-19 07:05:16,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:05:16,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-19 07:05:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:05:16,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-19 07:05:16,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1187, Invalid=1569, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:05:16,530 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:05:16,879 INFO L93 Difference]: Finished difference Result 132 states and 185 transitions. [2022-11-19 07:05:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 07:05:16,880 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-19 07:05:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:05:16,881 INFO L225 Difference]: With dead ends: 132 [2022-11-19 07:05:16,881 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 07:05:16,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1187, Invalid=1569, Unknown=0, NotChecked=0, Total=2756 [2022-11-19 07:05:16,883 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:05:16,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:05:16,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 07:05:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-19 07:05:16,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-11-19 07:05:16,895 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 51 [2022-11-19 07:05:16,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:05:16,896 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-11-19 07:05:16,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 07:05:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-11-19 07:05:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-19 07:05:16,898 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:05:16,898 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:05:16,906 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-19 07:05:17,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:17,104 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:05:17,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:05:17,105 INFO L85 PathProgramCache]: Analyzing trace with hash 411715915, now seen corresponding path program 5 times [2022-11-19 07:05:17,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:05:17,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349464099] [2022-11-19 07:05:17,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:05:17,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:05:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:05:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-11-19 07:05:20,215 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:05:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349464099] [2022-11-19 07:05:20,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349464099] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:05:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129908498] [2022-11-19 07:05:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 07:05:20,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:05:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:05:20,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:05:20,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_027120e4-9354-46ff-9060-05344dce6bf8/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process