./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/shared_mem2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-data/shared_mem2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7 --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 0f2b1437458922f937e4f63e8c97355790d0c2b77a3c021e76d395c8c90c4257 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:36:09,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:36:09,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:36:09,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:36:09,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:36:09,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:36:09,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:36:09,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:36:09,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:36:09,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:36:09,985 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:36:09,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:36:09,988 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:36:09,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:36:09,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:36:09,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:36:09,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:36:10,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:36:10,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:36:10,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:36:10,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:36:10,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:36:10,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:36:10,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:36:10,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:36:10,028 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:36:10,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:36:10,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:36:10,031 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:36:10,032 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:36:10,033 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:36:10,034 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:36:10,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:36:10,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:36:10,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:36:10,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:36:10,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:36:10,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:36:10,041 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:36:10,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:36:10,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:36:10,043 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:36:10,091 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:36:10,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:36:10,094 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:36:10,094 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:36:10,095 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:36:10,101 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:36:10,101 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:36:10,102 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:36:10,102 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:36:10,102 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:36:10,103 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:36:10,103 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:36:10,104 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:36:10,104 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:36:10,105 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:36:10,105 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:36:10,105 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:36:10,106 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:36:10,107 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:36:10,107 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:36:10,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:36:10,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:36:10,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:36:10,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:36:10,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:36:10,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:36:10,109 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:36:10,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:36:10,109 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:36:10,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:36:10,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:36:10,110 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:36:10,110 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:36:10,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:36:10,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:36:10,111 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:36:10,111 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:36:10,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:36:10,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:36:10,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:36:10,112 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:36:10,112 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f2b1437458922f937e4f63e8c97355790d0c2b77a3c021e76d395c8c90c4257 [2021-11-25 20:36:10,392 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:36:10,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:36:10,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:36:10,428 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:36:10,429 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:36:10,430 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/heap-data/shared_mem2.i [2021-11-25 20:36:10,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/data/510857ade/c823b44be64d4f9699279237e8264e1e/FLAGb119e6659 [2021-11-25 20:36:11,019 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:36:11,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/sv-benchmarks/c/heap-data/shared_mem2.i [2021-11-25 20:36:11,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/data/510857ade/c823b44be64d4f9699279237e8264e1e/FLAGb119e6659 [2021-11-25 20:36:11,310 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/data/510857ade/c823b44be64d4f9699279237e8264e1e [2021-11-25 20:36:11,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:36:11,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:36:11,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:36:11,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:36:11,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:36:11,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c8ff1c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11, skipping insertion in model container [2021-11-25 20:36:11,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:36:11,362 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:36:11,730 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/sv-benchmarks/c/heap-data/shared_mem2.i[23827,23840] [2021-11-25 20:36:11,734 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:36:11,744 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:36:11,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/sv-benchmarks/c/heap-data/shared_mem2.i[23827,23840] [2021-11-25 20:36:11,815 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:36:11,849 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:36:11,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11 WrapperNode [2021-11-25 20:36:11,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:36:11,851 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:36:11,851 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:36:11,851 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:36:11,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,915 INFO L137 Inliner]: procedures = 121, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 71 [2021-11-25 20:36:11,916 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:36:11,917 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:36:11,917 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:36:11,917 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:36:11,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,958 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:36:11,963 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:36:11,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:36:11,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:36:11,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (1/1) ... [2021-11-25 20:36:11,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:36:11,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:11,997 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:36:12,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:36:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:36:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:36:12,044 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 20:36:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:36:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 20:36:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 20:36:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:36:12,045 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:36:12,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:36:12,135 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:36:12,136 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:36:12,340 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:36:12,393 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:36:12,393 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 20:36:12,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:36:12 BoogieIcfgContainer [2021-11-25 20:36:12,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:36:12,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:36:12,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:36:12,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:36:12,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:36:11" (1/3) ... [2021-11-25 20:36:12,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a115773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:36:12, skipping insertion in model container [2021-11-25 20:36:12,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:36:11" (2/3) ... [2021-11-25 20:36:12,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a115773 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:36:12, skipping insertion in model container [2021-11-25 20:36:12,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:36:12" (3/3) ... [2021-11-25 20:36:12,406 INFO L111 eAbstractionObserver]: Analyzing ICFG shared_mem2.i [2021-11-25 20:36:12,411 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:36:12,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:36:12,495 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:36:12,516 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:36:12,517 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:36:12,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:12,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-25 20:36:12,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:12,549 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:12,549 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:12,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:12,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1277433734, now seen corresponding path program 1 times [2021-11-25 20:36:12,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:12,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282751801] [2021-11-25 20:36:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:12,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:12,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:12,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:12,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282751801] [2021-11-25 20:36:12,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282751801] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:12,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:12,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:36:12,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880024115] [2021-11-25 20:36:12,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:12,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 20:36:12,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 20:36:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:36:12,866 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:12,918 INFO L93 Difference]: Finished difference Result 21 states and 27 transitions. [2021-11-25 20:36:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 20:36:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-25 20:36:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:12,940 INFO L225 Difference]: With dead ends: 21 [2021-11-25 20:36:12,940 INFO L226 Difference]: Without dead ends: 10 [2021-11-25 20:36:12,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 20:36:12,953 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:12,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:36:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-25 20:36:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-25 20:36:12,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:12,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-11-25 20:36:12,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2021-11-25 20:36:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-11-25 20:36:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-11-25 20:36:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 20:36:12,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:12,991 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:12,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:36:12,992 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:12,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1240778891, now seen corresponding path program 1 times [2021-11-25 20:36:12,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:12,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699510192] [2021-11-25 20:36:12,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:12,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:13,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:13,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699510192] [2021-11-25 20:36:13,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699510192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:36:13,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:36:13,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:36:13,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196694549] [2021-11-25 20:36:13,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:36:13,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:36:13,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:13,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:36:13,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 20:36:13,189 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:13,253 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2021-11-25 20:36:13,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:36:13,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-25 20:36:13,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:13,254 INFO L225 Difference]: With dead ends: 19 [2021-11-25 20:36:13,254 INFO L226 Difference]: Without dead ends: 15 [2021-11-25 20:36:13,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:36:13,256 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:13,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:36:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-11-25 20:36:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-11-25 20:36:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2021-11-25 20:36:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-11-25 20:36:13,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-11-25 20:36:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:13,263 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-11-25 20:36:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-11-25 20:36:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:36:13,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:13,264 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:36:13,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -826033172, now seen corresponding path program 1 times [2021-11-25 20:36:13,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981219959] [2021-11-25 20:36:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:13,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:13,466 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981219959] [2021-11-25 20:36:13,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981219959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007973350] [2021-11-25 20:36:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:13,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:13,469 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:13,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:36:13,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:13,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:36:13,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:13,676 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:36:13,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 20:36:13,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:13,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 19 [2021-11-25 20:36:14,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 90 [2021-11-25 20:36:14,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 60 [2021-11-25 20:36:14,240 INFO L354 Elim1Store]: treesize reduction 16, result has 63.6 percent of original size [2021-11-25 20:36:14,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 48 [2021-11-25 20:36:14,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2021-11-25 20:36:14,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:14,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:15,193 INFO L354 Elim1Store]: treesize reduction 57, result has 1.7 percent of original size [2021-11-25 20:36:15,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 1 [2021-11-25 20:36:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:15,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007973350] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:36:15,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1343703639] [2021-11-25 20:36:15,229 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:36:15,229 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:36:15,235 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:36:15,241 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:36:15,241 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:36:15,348 INFO L354 Elim1Store]: treesize reduction 56, result has 37.8 percent of original size [2021-11-25 20:36:15,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 45 [2021-11-25 20:36:15,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,394 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:36:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-25 20:36:15,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,470 INFO L354 Elim1Store]: treesize reduction 39, result has 40.0 percent of original size [2021-11-25 20:36:15,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 53 treesize of output 46 [2021-11-25 20:36:15,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,490 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:36:15,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 52 [2021-11-25 20:36:15,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,539 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:36:15,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-25 20:36:15,624 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 20:36:15,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-25 20:36:15,743 INFO L354 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2021-11-25 20:36:15,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 131 [2021-11-25 20:36:15,770 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 20:36:15,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 87 [2021-11-25 20:36:15,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:15,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:15,817 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:36:15,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 34 [2021-11-25 20:36:15,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:15,902 INFO L354 Elim1Store]: treesize reduction 68, result has 60.2 percent of original size [2021-11-25 20:36:15,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 5 case distinctions, treesize of input 84 treesize of output 132 [2021-11-25 20:36:16,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:16,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:16,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:16,021 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:36:16,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 38 [2021-11-25 20:36:16,148 INFO L354 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2021-11-25 20:36:16,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 131 [2021-11-25 20:36:16,203 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 20:36:16,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 87 [2021-11-25 20:36:16,244 INFO L354 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2021-11-25 20:36:16,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 42 [2021-11-25 20:36:16,667 INFO L354 Elim1Store]: treesize reduction 37, result has 40.3 percent of original size [2021-11-25 20:36:16,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 131 [2021-11-25 20:36:16,697 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-25 20:36:16,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 87 [2021-11-25 20:36:16,734 INFO L354 Elim1Store]: treesize reduction 18, result has 60.9 percent of original size [2021-11-25 20:36:16,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 42 [2021-11-25 20:36:16,925 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:36:17,306 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '179#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~m~0#1.offset|) (<= |ULTIMATE.start_main_~m~0#1.offset| 0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~head~0#1.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~m~0#1.base|) |ULTIMATE.start_main_~m~0#1.offset|) 100)) (<= 0 |#NULL.offset|) (<= 0 |ULTIMATE.start_main_~head~0#1.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:36:17,306 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:17,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:36:17,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 7] total 17 [2021-11-25 20:36:17,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795908420] [2021-11-25 20:36:17,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:17,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:36:17,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:17,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:36:17,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-25 20:36:17,309 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:17,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:17,720 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-11-25 20:36:17,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-25 20:36:17,720 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:36:17,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:17,721 INFO L225 Difference]: With dead ends: 25 [2021-11-25 20:36:17,721 INFO L226 Difference]: Without dead ends: 12 [2021-11-25 20:36:17,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-11-25 20:36:17,723 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:17,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 42 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 62 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2021-11-25 20:36:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-25 20:36:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-25 20:36:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2021-11-25 20:36:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-11-25 20:36:17,726 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-11-25 20:36:17,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:17,727 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-11-25 20:36:17,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-11-25 20:36:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:36:17,728 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:17,728 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:17,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 20:36:17,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-25 20:36:17,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:17,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:17,938 INFO L85 PathProgramCache]: Analyzing trace with hash -315137184, now seen corresponding path program 1 times [2021-11-25 20:36:17,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:17,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50883247] [2021-11-25 20:36:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:17,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:18,068 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50883247] [2021-11-25 20:36:18,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50883247] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:36:18,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909060830] [2021-11-25 20:36:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:18,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:18,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:18,070 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:18,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:36:18,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:18,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-25 20:36:18,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:18,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2021-11-25 20:36:18,226 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:36:18,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 20 [2021-11-25 20:36:18,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-25 20:36:18,265 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:36:18,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-11-25 20:36:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 20:36:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:36:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:36:18,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:18,777 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~n~0#1.base_10| Int) (v_ArrVal_260 (Array Int Int)) (v_ArrVal_262 (Array Int Int))) (let ((.cse0 (select (select (store (store |c_#memory_int| |v_ULTIMATE.start_main_~n~0#1.base_10| v_ArrVal_262) |c_ULTIMATE.start_main_~list~0#1.base| v_ArrVal_260) |c_ULTIMATE.start_main_~m~0#1.base|) |c_ULTIMATE.start_main_~m~0#1.offset|))) (or (< .cse0 100) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~n~0#1.base_10|) 0)) (= |v_ULTIMATE.start_main_~n~0#1.base_10| 0) (= .cse0 100)))) (let ((.cse1 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~m~0#1.base|) |c_ULTIMATE.start_main_~m~0#1.offset|))) (or (< .cse1 100) (= .cse1 100)))) is different from false [2021-11-25 20:36:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 20:36:18,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909060830] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:36:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370998983] [2021-11-25 20:36:18,816 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:36:18,816 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:36:18,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:36:18,817 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:36:18,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:36:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,864 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:36:18,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-11-25 20:36:18,933 INFO L354 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2021-11-25 20:36:18,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 61 [2021-11-25 20:36:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 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 [2021-11-25 20:36:18,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 35 [2021-11-25 20:36:18,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 9 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 41 [2021-11-25 20:36:19,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-25 20:36:19,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:19,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2021-11-25 20:36:19,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 14 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 50 [2021-11-25 20:36:19,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2021-11-25 20:36:19,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 16 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 66 [2021-11-25 20:36:19,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,446 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 20:36:19,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 53 [2021-11-25 20:36:19,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:19,547 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-25 20:36:19,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 35 [2021-11-25 20:36:19,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:19,575 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-25 20:36:19,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 39 [2021-11-25 20:36:19,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2021-11-25 20:36:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:36:19,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:36:19,615 INFO L354 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2021-11-25 20:36:19,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 24 [2021-11-25 20:36:19,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:36:19,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:36:19,658 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:36:19,838 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '316#(and (= |ULTIMATE.start_main_~head~0#1.offset| |ULTIMATE.start_main_~list~0#1.offset|) (= |ULTIMATE.start_main_~head~0#1.offset| 0) (<= 100 (select (select |#memory_int| |ULTIMATE.start_main_~m~0#1.base|) |ULTIMATE.start_main_~m~0#1.offset|)) (= |ULTIMATE.start_main_~m~0#1.offset| 0) (= |ULTIMATE.start_main_~list~0#1.base| |ULTIMATE.start_main_~head~0#1.base|) (= |#NULL.offset| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~m~0#1.base|) |ULTIMATE.start_main_~m~0#1.offset|) 100)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:36:19,838 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:19,838 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:36:19,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 12 [2021-11-25 20:36:19,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119488395] [2021-11-25 20:36:19,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:19,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-25 20:36:19,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:19,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-25 20:36:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=280, Unknown=1, NotChecked=34, Total=380 [2021-11-25 20:36:19,840 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:20,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:20,001 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2021-11-25 20:36:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:36:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:36:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:20,002 INFO L225 Difference]: With dead ends: 12 [2021-11-25 20:36:20,002 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 20:36:20,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=376, Unknown=1, NotChecked=40, Total=506 [2021-11-25 20:36:20,003 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:20,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 23 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2021-11-25 20:36:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 20:36:20,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 20:36:20,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:20,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 20:36:20,005 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-11-25 20:36:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:20,005 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 20:36:20,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:20,005 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 20:36:20,005 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 20:36:20,007 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 20:36:20,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:36:20,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:20,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 20:36:20,253 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 20:36:20,254 INFO L858 garLoopResultBuilder]: For program point L576(lines 576 602) no Hoare annotation was computed. [2021-11-25 20:36:20,254 INFO L858 garLoopResultBuilder]: For program point L601(line 601) no Hoare annotation was computed. [2021-11-25 20:36:20,254 INFO L858 garLoopResultBuilder]: For program point L595-1(lines 595 599) no Hoare annotation was computed. [2021-11-25 20:36:20,254 INFO L854 garLoopResultBuilder]: At program point L595-3(lines 595 599) the Hoare annotation is: (<= (div (* (select (select |#memory_int| |ULTIMATE.start_main_~m~0#1.base|) |ULTIMATE.start_main_~m~0#1.offset|) (- 1)) (- 2)) 50) [2021-11-25 20:36:20,254 INFO L858 garLoopResultBuilder]: For program point L595-4(lines 595 599) no Hoare annotation was computed. [2021-11-25 20:36:20,254 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 20:36:20,255 INFO L858 garLoopResultBuilder]: For program point L600(lines 600 601) no Hoare annotation was computed. [2021-11-25 20:36:20,255 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 601) no Hoare annotation was computed. [2021-11-25 20:36:20,255 INFO L854 garLoopResultBuilder]: At program point L586-2(lines 584 593) the Hoare annotation is: (and (not (= |ULTIMATE.start_main_~m~0#1.base| |ULTIMATE.start_main_~head~0#1.base|)) (= (select |#valid| |ULTIMATE.start_main_~list~0#1.base|) 1) (not (= |ULTIMATE.start_main_~m~0#1.base| |ULTIMATE.start_main_~list~0#1.base|)) (= (select (select |#memory_int| |ULTIMATE.start_main_~m~0#1.base|) |ULTIMATE.start_main_~m~0#1.offset|) 0) (= (select |#valid| |ULTIMATE.start_main_~m~0#1.base|) 1)) [2021-11-25 20:36:20,255 INFO L858 garLoopResultBuilder]: For program point L584-1(lines 584 593) no Hoare annotation was computed. [2021-11-25 20:36:20,255 INFO L858 garLoopResultBuilder]: For program point L584-3(lines 584 593) no Hoare annotation was computed. [2021-11-25 20:36:20,258 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-25 20:36:20,260 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 20:36:20,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 08:36:20 BoogieIcfgContainer [2021-11-25 20:36:20,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 20:36:20,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 20:36:20,274 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 20:36:20,274 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 20:36:20,275 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:36:12" (3/4) ... [2021-11-25 20:36:20,278 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 20:36:20,286 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-11-25 20:36:20,287 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-25 20:36:20,287 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 20:36:20,287 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 20:36:20,320 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 20:36:20,320 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 20:36:20,321 INFO L158 Benchmark]: Toolchain (without parser) took 9007.11ms. Allocated memory was 92.3MB in the beginning and 165.7MB in the end (delta: 73.4MB). Free memory was 57.1MB in the beginning and 57.2MB in the end (delta: -118.4kB). Peak memory consumption was 74.2MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,321 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 64.9MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 20:36:20,322 INFO L158 Benchmark]: CACSL2BoogieTranslator took 534.64ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 57.0MB in the beginning and 87.4MB in the end (delta: -30.4MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,322 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.12ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 85.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,323 INFO L158 Benchmark]: Boogie Preprocessor took 45.28ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 84.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,323 INFO L158 Benchmark]: RCFGBuilder took 433.18ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 68.3MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,323 INFO L158 Benchmark]: TraceAbstraction took 7876.21ms. Allocated memory was 117.4MB in the beginning and 165.7MB in the end (delta: 48.2MB). Free memory was 67.9MB in the beginning and 60.4MB in the end (delta: 7.5MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,324 INFO L158 Benchmark]: Witness Printer took 46.27ms. Allocated memory is still 165.7MB. Free memory was 60.4MB in the beginning and 57.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 20:36:20,326 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 92.3MB. Free memory was 65.0MB in the beginning and 64.9MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 534.64ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 57.0MB in the beginning and 87.4MB in the end (delta: -30.4MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.12ms. Allocated memory is still 117.4MB. Free memory was 87.4MB in the beginning and 85.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.28ms. Allocated memory is still 117.4MB. Free memory was 85.4MB in the beginning and 84.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 433.18ms. Allocated memory is still 117.4MB. Free memory was 84.0MB in the beginning and 68.3MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 7876.21ms. Allocated memory was 117.4MB in the beginning and 165.7MB in the end (delta: 48.2MB). Free memory was 67.9MB in the beginning and 60.4MB in the end (delta: 7.5MB). Peak memory consumption was 57.8MB. Max. memory is 16.1GB. * Witness Printer took 46.27ms. Allocated memory is still 165.7MB. Free memory was 60.4MB in the beginning and 57.2MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 601]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.8s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 29 mSDsluCounter, 80 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 11 IncrementalHoareTripleChecker+Unchecked, 58 mSDsCounter, 16 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 104 IncrementalHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 16 mSolverCounterUnsat, 22 mSDtfsCounter, 104 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=2, InterpolantAutomatonStates: 22, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 37 HoareAnnotationTreeSize, 2 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 196 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 60 NumberOfCodeBlocks, 60 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 74 ConstructedInterpolants, 3 QuantifiedInterpolants, 898 SizeOfPredicates, 36 NumberOfNonLiveVariables, 288 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 1/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 595]: Loop Invariant Derived loop invariant: unknown-#memory_int-unknown[m][m] * -1 / -2 <= 50 - InvariantResult [Line: 584]: Loop Invariant Derived loop invariant: (((!(m == head) && \valid[list] == 1) && !(m == list)) && unknown-#memory_int-unknown[m][m] == 0) && \valid[m] == 1 RESULT: Ultimate proved your program to be correct! [2021-11-25 20:36:20,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6bbd08b0-85cb-4307-8a5c-9cd6aee4e1fb/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE