./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/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_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:32:23,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:32:23,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:32:23,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:32:23,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:32:23,940 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:32:23,942 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:32:23,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:32:23,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:32:23,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:32:23,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:32:23,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:32:23,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:32:23,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:32:23,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:32:23,977 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:32:23,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:32:23,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:32:23,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:32:23,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:32:23,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:32:24,002 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:32:24,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:32:24,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:32:24,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:32:24,022 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:32:24,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:32:24,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:32:24,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:32:24,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:32:24,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:32:24,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:32:24,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:32:24,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:32:24,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:32:24,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:32:24,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:32:24,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:32:24,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:32:24,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:32:24,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:32:24,038 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 20:32:24,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:32:24,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:32:24,102 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:32:24,102 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:32:24,103 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:32:24,104 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:32:24,104 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:32:24,104 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:32:24,104 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:32:24,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:32:24,106 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:32:24,106 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:32:24,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:32:24,107 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:32:24,107 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:32:24,107 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:32:24,108 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:32:24,108 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:32:24,109 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 20:32:24,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 20:32:24,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:32:24,109 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:32:24,110 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 20:32:24,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:32:24,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:32:24,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:32:24,113 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 20:32:24,113 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 20:32:24,113 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 20:32:24,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:32:24,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 20:32:24,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:32:24,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:32:24,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:32:24,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:32:24,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:32:24,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:32:24,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:32:24,116 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:32:24,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:32:24,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:32:24,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:32:24,117 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_70ced115-1882-402a-9927-16697283fdf4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2021-11-25 20:32:24,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:32:24,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:32:24,496 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:32:24,497 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:32:24,498 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:32:24,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-11-25 20:32:24,617 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/data/a170d6c88/954c65e9797341e3b5b65e1c40ff720c/FLAG47d76744d [2021-11-25 20:32:25,252 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:32:25,254 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2021-11-25 20:32:25,261 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/data/a170d6c88/954c65e9797341e3b5b65e1c40ff720c/FLAG47d76744d [2021-11-25 20:32:25,595 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/data/a170d6c88/954c65e9797341e3b5b65e1c40ff720c [2021-11-25 20:32:25,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:32:25,600 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:32:25,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:32:25,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:32:25,607 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:32:25,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0c74b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25, skipping insertion in model container [2021-11-25 20:32:25,610 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:32:25,637 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:32:25,849 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_70ced115-1882-402a-9927-16697283fdf4/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-11-25 20:32:25,865 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:32:25,873 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:32:25,888 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_70ced115-1882-402a-9927-16697283fdf4/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i[819,832] [2021-11-25 20:32:25,896 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:32:25,912 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:32:25,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25 WrapperNode [2021-11-25 20:32:25,913 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:32:25,914 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:32:25,915 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:32:25,915 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:32:25,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,954 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2021-11-25 20:32:25,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:32:25,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:32:25,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:32:25,955 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:32:25,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,975 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,979 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,980 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,983 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:32:25,984 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:32:25,984 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:32:25,984 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:32:25,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (1/1) ... [2021-11-25 20:32:25,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:32:26,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:26,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:32:26,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:32:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:32:26,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:32:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 20:32:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 20:32:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:32:26,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:32:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 20:32:26,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 20:32:26,185 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:32:26,188 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:32:26,512 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:32:26,581 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:32:26,582 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-25 20:32:26,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:32:26 BoogieIcfgContainer [2021-11-25 20:32:26,592 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:32:26,594 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:32:26,594 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:32:26,605 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:32:26,606 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:32:25" (1/3) ... [2021-11-25 20:32:26,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb2770e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:32:26, skipping insertion in model container [2021-11-25 20:32:26,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:32:25" (2/3) ... [2021-11-25 20:32:26,607 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fb2770e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:32:26, skipping insertion in model container [2021-11-25 20:32:26,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:32:26" (3/3) ... [2021-11-25 20:32:26,609 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2021-11-25 20:32:26,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:32:26,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-11-25 20:32:26,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:32:26,684 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 20:32:26,684 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-11-25 20:32:26,710 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 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 20:32:26,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:32:26,725 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:26,726 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:32:26,729 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:26,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash 114230, now seen corresponding path program 1 times [2021-11-25 20:32:26,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:26,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943895709] [2021-11-25 20:32:26,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:26,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:27,032 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 20:32:27,033 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:27,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943895709] [2021-11-25 20:32:27,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943895709] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:27,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:27,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:32:27,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106355848] [2021-11-25 20:32:27,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:27,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:27,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:27,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:27,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,101 INFO L87 Difference]: Start difference. First operand has 34 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 33 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:27,261 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2021-11-25 20:32:27,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:27,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-25 20:32:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:27,278 INFO L225 Difference]: With dead ends: 67 [2021-11-25 20:32:27,278 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 20:32:27,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,285 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:27,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 33 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:32:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 20:32:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 34. [2021-11-25 20:32:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 2.0) internal successors, (36), 33 states have internal predecessors, (36), 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 20:32:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-11-25 20:32:27,327 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 3 [2021-11-25 20:32:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:27,327 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-11-25 20:32:27,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-11-25 20:32:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:32:27,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:27,329 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:32:27,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:32:27,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:27,331 INFO L85 PathProgramCache]: Analyzing trace with hash 111798, now seen corresponding path program 1 times [2021-11-25 20:32:27,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:27,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276252132] [2021-11-25 20:32:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:27,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:27,402 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 20:32:27,402 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:27,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276252132] [2021-11-25 20:32:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276252132] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:27,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:27,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 20:32:27,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191878069] [2021-11-25 20:32:27,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:27,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:27,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:27,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:27,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,407 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:27,453 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-11-25 20:32:27,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-25 20:32:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:27,455 INFO L225 Difference]: With dead ends: 29 [2021-11-25 20:32:27,455 INFO L226 Difference]: Without dead ends: 29 [2021-11-25 20:32:27,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,458 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:27,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:32:27,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-25 20:32:27,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-25 20:32:27,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 28 states have internal predecessors, (31), 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 20:32:27,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-11-25 20:32:27,465 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 3 [2021-11-25 20:32:27,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:27,466 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-11-25 20:32:27,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-11-25 20:32:27,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-25 20:32:27,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:27,467 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-25 20:32:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:32:27,468 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:27,469 INFO L85 PathProgramCache]: Analyzing trace with hash 111799, now seen corresponding path program 1 times [2021-11-25 20:32:27,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419857516] [2021-11-25 20:32:27,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:27,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:27,622 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 20:32:27,623 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:27,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419857516] [2021-11-25 20:32:27,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419857516] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:27,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:32:27,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-25 20:32:27,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539874179] [2021-11-25 20:32:27,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:27,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:27,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:27,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:27,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,630 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:27,703 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-25 20:32:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:27,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2021-11-25 20:32:27,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:27,708 INFO L225 Difference]: With dead ends: 30 [2021-11-25 20:32:27,709 INFO L226 Difference]: Without dead ends: 30 [2021-11-25 20:32:27,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:32:27,717 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:27,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:32:27,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-25 20:32:27,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-25 20:32:27,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:27,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-25 20:32:27,732 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2021-11-25 20:32:27,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:27,732 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-25 20:32:27,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 20:32:27,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-25 20:32:27,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:32:27,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:27,734 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-25 20:32:27,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:32:27,735 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:27,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash 107509825, now seen corresponding path program 1 times [2021-11-25 20:32:27,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869623868] [2021-11-25 20:32:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:27,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:27,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:27,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:27,818 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:27,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869623868] [2021-11-25 20:32:27,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869623868] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:27,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743772756] [2021-11-25 20:32:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:27,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:27,822 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:27,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:32:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:32:27,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:27,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:27,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:27,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743772756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [677427607] [2021-11-25 20:32:27,985 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-11-25 20:32:27,985 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:27,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:27,997 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:27,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:28,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:28,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:32:28,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:28,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:28,487 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:32:28,492 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 4 case distinctions, treesize of input 249 treesize of output 248 [2021-11-25 20:32:28,853 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:28,911 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:29,052 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:29,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [677427607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:29,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:29,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3] total 9 [2021-11-25 20:32:29,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937582826] [2021-11-25 20:32:29,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:29,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:32:29,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:29,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:32:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:32:29,411 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:29,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:29,779 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2021-11-25 20:32:29,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:29,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 20:32:29,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:29,781 INFO L225 Difference]: With dead ends: 31 [2021-11-25 20:32:29,781 INFO L226 Difference]: Without dead ends: 31 [2021-11-25 20:32:29,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:29,783 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:29,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 44 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-25 20:32:29,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-25 20:32:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-25 20:32:29,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.65) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-25 20:32:29,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 5 [2021-11-25 20:32:29,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:29,800 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-25 20:32:29,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:29,801 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-25 20:32:29,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-25 20:32:29,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:29,803 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-11-25 20:32:29,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:30,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:30,027 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:30,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:30,028 INFO L85 PathProgramCache]: Analyzing trace with hash 107507393, now seen corresponding path program 1 times [2021-11-25 20:32:30,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:30,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238492146] [2021-11-25 20:32:30,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:30,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:30,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:30,140 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 20:32:30,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:30,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238492146] [2021-11-25 20:32:30,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238492146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:30,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284572865] [2021-11-25 20:32:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:30,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:30,143 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:30,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:32:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:30,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-25 20:32:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:30,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,233 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 9 treesize of output 11 [2021-11-25 20:32:30,241 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 10 treesize of output 8 [2021-11-25 20:32:30,300 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 20:32:30,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:30,365 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 20:32:30,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284572865] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:30,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1199517309] [2021-11-25 20:32:30,370 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-11-25 20:32:30,370 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:30,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:30,371 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:30,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:30,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:30,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:32:30,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:30,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:30,641 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:32:30,641 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 4 case distinctions, treesize of input 249 treesize of output 248 [2021-11-25 20:32:30,806 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:30,838 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:30,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:31,227 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= |ULTIMATE.start_main_#t~nondet2#1| 2147483647) (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet2#1|)) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:32:31,227 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:31,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:31,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2021-11-25 20:32:31,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976868634] [2021-11-25 20:32:31,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:31,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:32:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:32:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-25 20:32:31,231 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:31,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:31,371 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-25 20:32:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:32:31,372 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-25 20:32:31,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:31,373 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:32:31,373 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 20:32:31,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-25 20:32:31,374 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:31,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 47 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:32:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 20:32:31,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-25 20:32:31,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.5) internal successors, (39), 34 states have internal predecessors, (39), 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 20:32:31,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-25 20:32:31,381 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2021-11-25 20:32:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:31,381 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-25 20:32:31,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-25 20:32:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 20:32:31,382 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:31,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:31,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:31,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:31,583 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:31,584 INFO L85 PathProgramCache]: Analyzing trace with hash 923771867, now seen corresponding path program 1 times [2021-11-25 20:32:31,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:31,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208020376] [2021-11-25 20:32:31,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:31,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:31,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:31,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208020376] [2021-11-25 20:32:31,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208020376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:31,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387863117] [2021-11-25 20:32:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:31,640 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:31,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:31,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:31,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:32:31,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:31,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:32:31,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:31,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:31,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387863117] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:31,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098291658] [2021-11-25 20:32:31,801 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:32:31,801 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:31,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:31,802 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:31,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:31,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:32:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:31,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:32,007 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:32:32,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:32:32,110 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:32,139 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:32,259 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:32,938 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '533#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (exists ((|v_ULTIMATE.start_main_~i~0#1_73| Int)) (and (<= 100000 |v_ULTIMATE.start_main_~i~0#1_73|) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~0#1_73|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_73| 4))) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_73| 4))) 2147483647) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~0#1_73|))))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (not (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:32:32,938 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:32,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:32,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-25 20:32:32,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463585503] [2021-11-25 20:32:32,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:32,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-25 20:32:32,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:32,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-25 20:32:32,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:32:32,940 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:33,160 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2021-11-25 20:32:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:32:33,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-25 20:32:33,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:33,166 INFO L225 Difference]: With dead ends: 169 [2021-11-25 20:32:33,166 INFO L226 Difference]: Without dead ends: 169 [2021-11-25 20:32:33,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-11-25 20:32:33,168 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 185 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:33,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 78 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:32:33,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-25 20:32:33,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 38. [2021-11-25 20:32:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 37 states have internal predecessors, (41), 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 20:32:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-11-25 20:32:33,184 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 10 [2021-11-25 20:32:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:33,184 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-11-25 20:32:33,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-11-25 20:32:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-25 20:32:33,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:33,186 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-11-25 20:32:33,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:33,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:33,415 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:33,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:33,416 INFO L85 PathProgramCache]: Analyzing trace with hash 687930847, now seen corresponding path program 2 times [2021-11-25 20:32:33,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:33,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235414163] [2021-11-25 20:32:33,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:33,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:33,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:33,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235414163] [2021-11-25 20:32:33,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235414163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786930787] [2021-11-25 20:32:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:32:33,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:33,618 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:33,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:32:33,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:32:33,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:32:33,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:32:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:33,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:33,711 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 9 treesize of output 11 [2021-11-25 20:32:33,716 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 18 treesize of output 16 [2021-11-25 20:32:33,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 20:32:33,851 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:33,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786930787] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:33,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:33,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2021-11-25 20:32:33,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223561730] [2021-11-25 20:32:33,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:33,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 20:32:33,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:33,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 20:32:33,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:32:33,854 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:33,914 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-11-25 20:32:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:32:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-25 20:32:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:33,915 INFO L225 Difference]: With dead ends: 37 [2021-11-25 20:32:33,915 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 20:32:33,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:32:33,917 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:33,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:32:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 20:32:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-25 20:32:33,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 36 states have internal predecessors, (39), 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 20:32:33,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-25 20:32:33,922 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 11 [2021-11-25 20:32:33,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:33,922 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-25 20:32:33,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:33,923 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-25 20:32:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:32:33,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:33,924 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:33,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:34,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 20:32:34,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash 841694643, now seen corresponding path program 2 times [2021-11-25 20:32:34,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117611978] [2021-11-25 20:32:34,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:34,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:34,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:34,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:34,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117611978] [2021-11-25 20:32:34,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117611978] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186218090] [2021-11-25 20:32:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:32:34,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:34,251 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:34,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:32:34,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:32:34,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:32:34,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:32:34,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:34,329 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:32:34,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-25 20:32:34,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-25 20:32:34,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:34,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186218090] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:34,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:34,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [8] total 9 [2021-11-25 20:32:34,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244524700] [2021-11-25 20:32:34,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:34,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:32:34,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:34,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:32:34,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:32:34,385 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 20:32:34,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:34,406 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-11-25 20:32:34,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:32:34,407 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 18 [2021-11-25 20:32:34,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:34,408 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:32:34,408 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 20:32:34,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-11-25 20:32:34,409 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:34,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:32:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 20:32:34,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-25 20:32:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 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 20:32:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-11-25 20:32:34,428 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 18 [2021-11-25 20:32:34,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:34,429 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-11-25 20:32:34,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 20:32:34,429 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-11-25 20:32:34,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 20:32:34,430 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:34,430 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:34,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:34,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:32:34,651 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:34,651 INFO L85 PathProgramCache]: Analyzing trace with hash 841694644, now seen corresponding path program 1 times [2021-11-25 20:32:34,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:34,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621970766] [2021-11-25 20:32:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:34,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:34,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621970766] [2021-11-25 20:32:34,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621970766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:34,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862570241] [2021-11-25 20:32:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:34,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:34,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:34,760 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:34,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:32:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:32:34,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:34,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:35,025 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:35,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862570241] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:35,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939844922] [2021-11-25 20:32:35,029 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:32:35,029 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:35,029 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:35,030 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:35,030 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:35,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:35,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:32:35,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:35,207 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:32:35,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:32:35,284 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:35,309 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:35,420 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:36,026 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1111#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) 0)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (and (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~0#1_93|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 4) (- 4))) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_93| 4) (- 4))) 2147483647) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_93|) (<= 4 (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |v_ULTIMATE.start_main_~i~0#1_93|))))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:32:36,026 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:36,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:36,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2021-11-25 20:32:36,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050507120] [2021-11-25 20:32:36,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:36,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 20:32:36,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:36,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 20:32:36,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=320, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:32:36,029 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:36,457 INFO L93 Difference]: Finished difference Result 329 states and 345 transitions. [2021-11-25 20:32:36,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:32:36,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 20:32:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:36,461 INFO L225 Difference]: With dead ends: 329 [2021-11-25 20:32:36,461 INFO L226 Difference]: Without dead ends: 329 [2021-11-25 20:32:36,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=232, Invalid=320, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:32:36,462 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 594 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:36,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 145 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-11-25 20:32:36,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 51. [2021-11-25 20:32:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2021-11-25 20:32:36,481 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 18 [2021-11-25 20:32:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:36,482 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2021-11-25 20:32:36,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2021-11-25 20:32:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:32:36,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:36,484 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:36,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:36,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:36,690 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:36,691 INFO L85 PathProgramCache]: Analyzing trace with hash -596088476, now seen corresponding path program 2 times [2021-11-25 20:32:36,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:36,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607820959] [2021-11-25 20:32:36,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:36,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:37,031 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:37,031 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:37,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607820959] [2021-11-25 20:32:37,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607820959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:37,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809913108] [2021-11-25 20:32:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:32:37,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:37,033 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:37,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:32:37,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:32:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:32:37,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:32:37,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:37,131 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:32:37,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-25 20:32:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-25 20:32:37,350 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:32:37,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809913108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:37,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:32:37,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2021-11-25 20:32:37,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860570489] [2021-11-25 20:32:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:37,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:32:37,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:32:37,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:32:37,352 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 20:32:37,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:37,400 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-11-25 20:32:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:32:37,401 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 20:32:37,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:37,402 INFO L225 Difference]: With dead ends: 65 [2021-11-25 20:32:37,402 INFO L226 Difference]: Without dead ends: 65 [2021-11-25 20:32:37,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2021-11-25 20:32:37,403 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:37,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 17 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:32:37,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-25 20:32:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-11-25 20:32:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 56 states have internal predecessors, (62), 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 20:32:37,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2021-11-25 20:32:37,408 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 34 [2021-11-25 20:32:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:37,409 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2021-11-25 20:32:37,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 20:32:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2021-11-25 20:32:37,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-25 20:32:37,411 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:37,411 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:37,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:37,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-25 20:32:37,627 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:37,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:37,628 INFO L85 PathProgramCache]: Analyzing trace with hash -596090076, now seen corresponding path program 1 times [2021-11-25 20:32:37,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:37,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771103926] [2021-11-25 20:32:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:37,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:37,835 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:37,836 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771103926] [2021-11-25 20:32:37,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771103926] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:37,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692362741] [2021-11-25 20:32:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:37,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:37,846 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:37,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:32:37,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:32:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:38,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:38,479 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:38,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692362741] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:38,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1881423822] [2021-11-25 20:32:38,482 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:32:38,482 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:38,482 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:38,483 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:38,483 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:38,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:32:38,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:38,681 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:32:38,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:32:38,771 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:38,792 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:38,894 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1881423822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:32:39,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:39,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [16, 16, 16] total 37 [2021-11-25 20:32:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214610437] [2021-11-25 20:32:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:32:39,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:32:39,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:32:39,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=773, Unknown=0, NotChecked=0, Total=1406 [2021-11-25 20:32:39,343 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 20:32:39,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:39,603 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2021-11-25 20:32:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:32:39,604 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-25 20:32:39,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:39,605 INFO L225 Difference]: With dead ends: 59 [2021-11-25 20:32:39,605 INFO L226 Difference]: Without dead ends: 59 [2021-11-25 20:32:39,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=637, Invalid=845, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 20:32:39,607 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:39,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 41 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2021-11-25 20:32:39,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-25 20:32:39,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-25 20:32:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 58 states have internal predecessors, (64), 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 20:32:39,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2021-11-25 20:32:39,612 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 34 [2021-11-25 20:32:39,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:39,612 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2021-11-25 20:32:39,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 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 20:32:39,613 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2021-11-25 20:32:39,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-25 20:32:39,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:39,614 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:39,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:39,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:32:39,815 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:39,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:39,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1298872181, now seen corresponding path program 1 times [2021-11-25 20:32:39,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:39,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783505549] [2021-11-25 20:32:39,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:39,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:39,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:40,017 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:32:40,018 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783505549] [2021-11-25 20:32:40,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783505549] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:40,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334745296] [2021-11-25 20:32:40,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:40,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:40,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:40,019 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:40,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:32:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:40,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-25 20:32:40,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:32:40,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:32:40,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334745296] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1976350408] [2021-11-25 20:32:40,617 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:32:40,618 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:40,618 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:40,618 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:40,619 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:40,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:40,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:32:40,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:40,810 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:32:40,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:32:40,910 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:40,939 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:41,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:41,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:41,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:41,075 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:41,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2021-11-25 20:32:41,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:41,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:41,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:41,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:41,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:41,346 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-25 20:32:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-25 20:32:41,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:41,472 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:41,472 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 25 treesize of output 25 [2021-11-25 20:32:41,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:41,520 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:41,520 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 25 treesize of output 25 [2021-11-25 20:32:41,579 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:42,303 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2331#(and (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |#NULL.base| 0) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (<= 4 (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:32:42,304 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:42,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:42,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2021-11-25 20:32:42,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731373289] [2021-11-25 20:32:42,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:42,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-25 20:32:42,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:42,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-25 20:32:42,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=936, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 20:32:42,307 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:43,277 INFO L93 Difference]: Finished difference Result 680 states and 712 transitions. [2021-11-25 20:32:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-25 20:32:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-25 20:32:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:43,283 INFO L225 Difference]: With dead ends: 680 [2021-11-25 20:32:43,283 INFO L226 Difference]: Without dead ends: 680 [2021-11-25 20:32:43,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=546, Invalid=936, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 20:32:43,285 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1515 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:43,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 280 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-25 20:32:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-25 20:32:43,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 91. [2021-11-25 20:32:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1294117647058823) internal successors, (96), 90 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-11-25 20:32:43,296 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 35 [2021-11-25 20:32:43,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:43,297 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-11-25 20:32:43,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:32:43,297 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-11-25 20:32:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 20:32:43,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:43,300 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:43,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:43,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:32:43,515 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:43,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:43,516 INFO L85 PathProgramCache]: Analyzing trace with hash -532054741, now seen corresponding path program 2 times [2021-11-25 20:32:43,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:43,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585990176] [2021-11-25 20:32:43,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:43,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 20:32:44,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:44,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585990176] [2021-11-25 20:32:44,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585990176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:44,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272319032] [2021-11-25 20:32:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:32:44,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:44,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:44,159 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:44,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:32:44,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-25 20:32:44,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:32:44,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-25 20:32:44,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-25 20:32:44,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:44,768 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 24 treesize of output 20 [2021-11-25 20:32:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 870 trivial. 0 not checked. [2021-11-25 20:32:44,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272319032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1542687568] [2021-11-25 20:32:44,970 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:32:44,970 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:44,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:44,971 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:44,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:45,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:32:45,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,175 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:32:45,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:32:45,252 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:45,274 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:45,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:45,385 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:45,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2021-11-25 20:32:45,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:45,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:45,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:45,628 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-25 20:32:45,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 225 treesize of output 191 [2021-11-25 20:32:45,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:45,743 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:45,743 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-11-25 20:32:45,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:45,785 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:32:45,786 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 25 treesize of output 25 [2021-11-25 20:32:45,847 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:46,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3545#(and (<= 0 |#NULL.base|) (= (select |#valid| |ULTIMATE.start_main_~#dst~0#1.base|) 1) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|)) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (<= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (<= 0 |ULTIMATE.start_main_~#src~0#1.offset|) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) (select (select |#memory_int| |ULTIMATE.start_main_~#dst~0#1.base|) (+ |ULTIMATE.start_main_~#dst~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= |#NULL.base| 0) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|) (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (<= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (<= 4 (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset|)) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 20:32:46,821 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:46,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:46,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 4, 4] total 40 [2021-11-25 20:32:46,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830313317] [2021-11-25 20:32:46,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:46,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 20:32:46,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 20:32:46,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=691, Invalid=1471, Unknown=0, NotChecked=0, Total=2162 [2021-11-25 20:32:46,825 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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 20:32:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:51,207 INFO L93 Difference]: Finished difference Result 730 states and 766 transitions. [2021-11-25 20:32:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-25 20:32:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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 67 [2021-11-25 20:32:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:51,214 INFO L225 Difference]: With dead ends: 730 [2021-11-25 20:32:51,214 INFO L226 Difference]: Without dead ends: 730 [2021-11-25 20:32:51,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3742, Invalid=8468, Unknown=0, NotChecked=0, Total=12210 [2021-11-25 20:32:51,247 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 2706 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 537 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2706 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:51,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2706 Valid, 289 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-25 20:32:51,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-11-25 20:32:51,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 120. [2021-11-25 20:32:51,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2017543859649122) internal successors, (137), 119 states have internal predecessors, (137), 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 20:32:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2021-11-25 20:32:51,277 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 67 [2021-11-25 20:32:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:51,277 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2021-11-25 20:32:51,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 40 states have internal predecessors, (87), 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 20:32:51,278 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2021-11-25 20:32:51,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-25 20:32:51,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:51,280 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:51,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:51,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:51,491 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash -279830977, now seen corresponding path program 1 times [2021-11-25 20:32:51,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:51,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908599714] [2021-11-25 20:32:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:51,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:52,293 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908599714] [2021-11-25 20:32:52,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908599714] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195986852] [2021-11-25 20:32:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:52,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:52,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:52,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:52,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:32:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-25 20:32:52,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:52,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:32:54,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195986852] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:54,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538732811] [2021-11-25 20:32:54,174 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-25 20:32:54,175 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:54,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:54,175 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:54,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:54,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:32:54,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:32:54,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:32:54,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:32:54,335 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:32:54,336 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 4 case distinctions, treesize of input 249 treesize of output 248 [2021-11-25 20:32:54,516 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:54,546 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:32:54,724 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:32:54,725 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 2 case distinctions, treesize of input 15 treesize of output 14 [2021-11-25 20:32:54,773 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:55,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5016#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_284| Int) (|v_ULTIMATE.start_main_~#src~0#1.base_27| Int)) (and (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (+ (- 4) (* |v_ULTIMATE.start_main_~i~0#1_284| 4))) 2147483647) (<= 100000 |v_ULTIMATE.start_main_~i~0#1_284|) (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_27|) 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= (* 4 |v_ULTIMATE.start_main_~i~0#1_284|) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_27|) (<= 4 (* 4 |v_ULTIMATE.start_main_~i~0#1_284|)) (<= 0 (+ (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) (+ (- 4) (* |v_ULTIMATE.start_main_~i~0#1_284| 4))) 2147483648)) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_27|)) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_27|) 0) 0))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:32:55,451 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:55,451 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:55,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 66 [2021-11-25 20:32:55,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525541405] [2021-11-25 20:32:55,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:55,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-25 20:32:55,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:55,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-25 20:32:55,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2622, Invalid=2928, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 20:32:55,456 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 20:32:59,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:59,002 INFO L93 Difference]: Finished difference Result 1443 states and 1517 transitions. [2021-11-25 20:32:59,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-25 20:32:59,003 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 71 [2021-11-25 20:32:59,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:59,011 INFO L225 Difference]: With dead ends: 1443 [2021-11-25 20:32:59,012 INFO L226 Difference]: Without dead ends: 1443 [2021-11-25 20:32:59,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2622, Invalid=2928, Unknown=0, NotChecked=0, Total=5550 [2021-11-25 20:32:59,015 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4853 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4853 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:32:59,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4853 Valid, 586 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-25 20:32:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-11-25 20:32:59,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 186. [2021-11-25 20:32:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.1277777777777778) internal successors, (203), 185 states have internal predecessors, (203), 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 20:32:59,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 203 transitions. [2021-11-25 20:32:59,049 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 203 transitions. Word has length 71 [2021-11-25 20:32:59,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:59,049 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 203 transitions. [2021-11-25 20:32:59,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0597014925373136) internal successors, (138), 66 states have internal predecessors, (138), 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 20:32:59,050 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 203 transitions. [2021-11-25 20:32:59,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-25 20:32:59,052 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:59,053 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:32:59,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:59,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:32:59,266 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:32:59,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:59,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1822331767, now seen corresponding path program 2 times [2021-11-25 20:32:59,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:59,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800383445] [2021-11-25 20:32:59,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:59,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:59,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:33:01,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800383445] [2021-11-25 20:33:01,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800383445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:01,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076490830] [2021-11-25 20:33:01,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:33:01,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:01,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:01,230 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:01,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:33:01,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:33:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:33:01,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2021-11-25 20:33:02,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:33:02,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076490830] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:33:02,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:33:02,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [66] total 68 [2021-11-25 20:33:02,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600694649] [2021-11-25 20:33:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:33:02,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:33:02,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:33:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 20:33:02,742 INFO L87 Difference]: Start difference. First operand 186 states and 203 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 20:33:02,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:02,748 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2021-11-25 20:33:02,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:33:02,749 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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) Word has length 137 [2021-11-25 20:33:02,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:02,750 INFO L225 Difference]: With dead ends: 192 [2021-11-25 20:33:02,750 INFO L226 Difference]: Without dead ends: 190 [2021-11-25 20:33:02,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 20:33:02,753 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:02,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 38 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 18 Unchecked, 0.0s Time] [2021-11-25 20:33:02,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-25 20:33:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-11-25 20:33:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 183 states have (on average 1.1256830601092895) internal successors, (206), 188 states have internal predecessors, (206), 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 20:33:02,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 206 transitions. [2021-11-25 20:33:02,759 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 206 transitions. Word has length 137 [2021-11-25 20:33:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:02,759 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 206 transitions. [2021-11-25 20:33:02,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 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 20:33:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 206 transitions. [2021-11-25 20:33:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-25 20:33:02,761 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:02,761 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 20:33:02,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:02,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 20:33:02,987 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:33:02,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:02,987 INFO L85 PathProgramCache]: Analyzing trace with hash 861527848, now seen corresponding path program 1 times [2021-11-25 20:33:02,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:02,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141833772] [2021-11-25 20:33:02,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:02,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:03,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:33:04,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:04,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141833772] [2021-11-25 20:33:04,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141833772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:04,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575493312] [2021-11-25 20:33:04,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:04,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:04,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:04,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-25 20:33:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:04,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 920 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-25 20:33:04,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:33:05,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4100 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:33:10,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575493312] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:10,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [229281505] [2021-11-25 20:33:10,187 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:33:10,187 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:10,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:10,188 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:10,188 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:33:10,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:33:10,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:10,329 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:33:10,330 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 4 case distinctions, treesize of input 249 treesize of output 248 [2021-11-25 20:33:10,454 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:33:10,478 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:33:10,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:10,615 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:10,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2021-11-25 20:33:10,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:10,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:10,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:10,877 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-25 20:33:10,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-25 20:33:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:10,984 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:10,985 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 25 treesize of output 25 [2021-11-25 20:33:11,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:11,023 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:11,024 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 25 treesize of output 25 [2021-11-25 20:33:11,034 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:11,850 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8466#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:11,850 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:11,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:11,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 132 [2021-11-25 20:33:11,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973407014] [2021-11-25 20:33:11,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:11,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2021-11-25 20:33:11,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:11,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-11-25 20:33:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8796, Invalid=10386, Unknown=0, NotChecked=0, Total=19182 [2021-11-25 20:33:11,861 INFO L87 Difference]: Start difference. First operand 189 states and 206 transitions. Second operand has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 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 20:33:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:36,207 INFO L93 Difference]: Finished difference Result 2897 states and 3037 transitions. [2021-11-25 20:33:36,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-25 20:33:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 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 138 [2021-11-25 20:33:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:36,222 INFO L225 Difference]: With dead ends: 2897 [2021-11-25 20:33:36,222 INFO L226 Difference]: Without dead ends: 2897 [2021-11-25 20:33:36,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1427 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=8796, Invalid=10386, Unknown=0, NotChecked=0, Total=19182 [2021-11-25 20:33:36,226 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 9871 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 1674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9871 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 3378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1674 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:36,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9871 Valid, 1180 Invalid, 3378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1674 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-11-25 20:33:36,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-11-25 20:33:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 321. [2021-11-25 20:33:36,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 315 states have (on average 1.073015873015873) internal successors, (338), 320 states have internal predecessors, (338), 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 20:33:36,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 338 transitions. [2021-11-25 20:33:36,250 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 338 transitions. Word has length 138 [2021-11-25 20:33:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:36,250 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 338 transitions. [2021-11-25 20:33:36,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0150375939849625) internal successors, (268), 132 states have internal predecessors, (268), 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 20:33:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 338 transitions. [2021-11-25 20:33:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-11-25 20:33:36,253 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:36,254 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 20:33:36,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:36,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-25 20:33:36,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:33:36,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:36,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1119712404, now seen corresponding path program 2 times [2021-11-25 20:33:36,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:36,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464938509] [2021-11-25 20:33:36,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:36,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 16900 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 20:33:42,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464938509] [2021-11-25 20:33:42,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464938509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:42,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039340255] [2021-11-25 20:33:42,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:33:42,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:42,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:42,530 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:42,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-25 20:33:42,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:33:42,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:33:42,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 20:33:42,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:42,701 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 10 treesize of output 8 [2021-11-25 20:33:42,707 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 9 treesize of output 11 [2021-11-25 20:33:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2021-11-25 20:33:46,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16904 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16901 trivial. 0 not checked. [2021-11-25 20:33:51,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039340255] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:51,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1733599455] [2021-11-25 20:33:51,249 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-11-25 20:33:51,249 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:51,249 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:51,250 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:51,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:51,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:33:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2021-11-25 20:33:51,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:51,369 INFO L354 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2021-11-25 20:33:51,369 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 4 case distinctions, treesize of input 249 treesize of output 248 [2021-11-25 20:33:51,577 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:33:51,595 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:33:51,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:33:51,690 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-25 20:33:51,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 39 [2021-11-25 20:33:51,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:51,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:51,933 INFO L354 Elim1Store]: treesize reduction 317, result has 17.0 percent of original size [2021-11-25 20:33:51,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 210 treesize of output 195 [2021-11-25 20:33:52,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:52,067 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:52,068 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 25 treesize of output 25 [2021-11-25 20:33:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:33:52,103 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:33:52,103 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 25 treesize of output 25 [2021-11-25 20:33:52,122 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:53,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13441#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_main_~#src~0#1.base|) 1) (<= (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |ULTIMATE.start_main_~#src~0#1.base|)) (= |ULTIMATE.start_main_#t~mem4#1| (select (select |#memory_int| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (< (select |#length| |ULTIMATE.start_main_~#dst~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~i~0#1|) |ULTIMATE.start_main_~#dst~0#1.offset| 4)) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:33:53,351 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:53,351 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:53,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [132, 2, 2] total 136 [2021-11-25 20:33:53,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477142635] [2021-11-25 20:33:53,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:53,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2021-11-25 20:33:53,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-11-25 20:33:53,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8806, Invalid=11500, Unknown=0, NotChecked=0, Total=20306 [2021-11-25 20:33:53,357 INFO L87 Difference]: Start difference. First operand 321 states and 338 transitions. Second operand has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 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 20:34:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:06,754 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2021-11-25 20:34:06,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-11-25 20:34:06,755 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 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 270 [2021-11-25 20:34:06,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:06,757 INFO L225 Difference]: With dead ends: 324 [2021-11-25 20:34:06,757 INFO L226 Difference]: Without dead ends: 324 [2021-11-25 20:34:06,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 799 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10357 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=27035, Invalid=49417, Unknown=0, NotChecked=0, Total=76452 [2021-11-25 20:34:06,764 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 306 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:06,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 65 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 329 Invalid, 0 Unknown, 293 Unchecked, 0.4s Time] [2021-11-25 20:34:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-11-25 20:34:06,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2021-11-25 20:34:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 314 states have (on average 1.0477707006369428) internal successors, (329), 317 states have internal predecessors, (329), 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 20:34:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 329 transitions. [2021-11-25 20:34:06,772 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 329 transitions. Word has length 270 [2021-11-25 20:34:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:06,773 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 329 transitions. [2021-11-25 20:34:06,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.124087591240876) internal successors, (291), 136 states have internal predecessors, (291), 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 20:34:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 329 transitions. [2021-11-25 20:34:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2021-11-25 20:34:06,777 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:06,777 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:06,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:07,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 20:34:07,003 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:34:07,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:07,003 INFO L85 PathProgramCache]: Analyzing trace with hash 514028516, now seen corresponding path program 1 times [2021-11-25 20:34:07,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:07,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168700777] [2021-11-25 20:34:07,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:07,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:13,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168700777] [2021-11-25 20:34:13,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168700777] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:13,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529190707] [2021-11-25 20:34:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:13,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:13,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:13,240 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:13,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-25 20:34:13,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:13,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1790 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-25 20:34:13,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:14,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:31,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17161 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529190707] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:31,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445762986] [2021-11-25 20:34:31,058 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:34:31,058 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:31,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:34:31,059 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:34:31,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:34:31,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:34:31,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:34:31,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:31,184 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:34:31,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:34:31,248 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:34:31,265 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:34:31,350 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:34:31,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1445762986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:31,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:34:31,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [133, 133, 133] total 272 [2021-11-25 20:34:31,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336554689] [2021-11-25 20:34:31,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:31,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:34:31,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:31,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:34:31,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36587, Invalid=37669, Unknown=0, NotChecked=0, Total=74256 [2021-11-25 20:34:31,979 INFO L87 Difference]: Start difference. First operand 318 states and 329 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:32,322 INFO L93 Difference]: Finished difference Result 318 states and 328 transitions. [2021-11-25 20:34:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 20:34:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2021-11-25 20:34:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:32,326 INFO L225 Difference]: With dead ends: 318 [2021-11-25 20:34:32,326 INFO L226 Difference]: Without dead ends: 315 [2021-11-25 20:34:32,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 951 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4092 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=36591, Invalid=38211, Unknown=0, NotChecked=0, Total=74802 [2021-11-25 20:34:32,332 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:32,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2021-11-25 20:34:32,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-25 20:34:32,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-25 20:34:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 311 states have (on average 1.045016077170418) internal successors, (325), 314 states have internal predecessors, (325), 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 20:34:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 325 transitions. [2021-11-25 20:34:32,339 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 325 transitions. Word has length 273 [2021-11-25 20:34:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:32,340 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 325 transitions. [2021-11-25 20:34:32,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 325 transitions. [2021-11-25 20:34:32,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-11-25 20:34:32,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:32,344 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:32,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:32,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:34:32,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:34:32,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:32,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1949300369, now seen corresponding path program 1 times [2021-11-25 20:34:32,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:32,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052580392] [2021-11-25 20:34:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:32,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:32,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:38,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:34:38,864 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:38,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052580392] [2021-11-25 20:34:38,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052580392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:38,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458384756] [2021-11-25 20:34:38,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:38,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:38,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:38,865 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:38,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-25 20:34:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:39,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 1803 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-25 20:34:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:34:39,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 17163 backedges. 0 proven. 17161 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:34:56,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458384756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:56,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1700270389] [2021-11-25 20:34:56,634 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2021-11-25 20:34:56,634 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:56,635 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:34:56,635 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:34:56,635 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:34:56,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:34:56,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:34:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,766 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:34:56,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:34:56,827 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:34:56,843 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:34:56,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:56,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:56,920 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:34:56,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2021-11-25 20:34:57,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:57,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:57,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:34:57,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:57,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:57,084 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-25 20:34:57,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-25 20:34:57,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:57,164 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:34:57,164 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 25 treesize of output 25 [2021-11-25 20:34:57,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:34:57,192 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:34:57,192 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 25 treesize of output 25 [2021-11-25 20:34:57,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 20:34:57,242 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 2 case distinctions, treesize of input 15 treesize of output 14 [2021-11-25 20:34:57,255 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:34:58,370 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18808#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_30| Int)) (and (= (select |#valid| |v_ULTIMATE.start_main_~#src~0#1.base_30|) 0) (= (select (select |#memory_int| |v_ULTIMATE.start_main_~#src~0#1.base_30|) (* |ULTIMATE.start_main_~i~0#1| 4)) 0) (<= 0 |v_ULTIMATE.start_main_~#src~0#1.base_30|) (<= (+ (* 4 |ULTIMATE.start_main_~i~0#1|) 4) (select |#length| |v_ULTIMATE.start_main_~#src~0#1.base_30|)))) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:34:58,370 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:34:58,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:34:58,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 133, 133] total 266 [2021-11-25 20:34:58,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293967587] [2021-11-25 20:34:58,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:34:58,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2021-11-25 20:34:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2021-11-25 20:34:58,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2021-11-25 20:34:58,381 INFO L87 Difference]: Start difference. First operand 315 states and 325 transitions. Second operand has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 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 20:39:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:39:59,828 INFO L93 Difference]: Finished difference Result 5314 states and 5585 transitions. [2021-11-25 20:39:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-11-25 20:39:59,829 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 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 275 [2021-11-25 20:39:59,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:39:59,845 INFO L225 Difference]: With dead ends: 5314 [2021-11-25 20:39:59,845 INFO L226 Difference]: Without dead ends: 5314 [2021-11-25 20:39:59,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5158 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=36866, Invalid=39586, Unknown=0, NotChecked=0, Total=76452 [2021-11-25 20:39:59,849 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23106 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 2915 mSolverCounterSat, 4295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23106 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 7210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 4295 IncrementalHoareTripleChecker+Valid, 2915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:39:59,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23106 Valid, 2386 Invalid, 7210 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [4295 Valid, 2915 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-25 20:39:59,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5314 states. [2021-11-25 20:39:59,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5314 to 581. [2021-11-25 20:39:59,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 577 states have (on average 1.024263431542461) internal successors, (591), 580 states have internal predecessors, (591), 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 20:39:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 591 transitions. [2021-11-25 20:39:59,891 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 591 transitions. Word has length 275 [2021-11-25 20:39:59,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:39:59,891 INFO L470 AbstractCegarLoop]: Abstraction has 581 states and 591 transitions. [2021-11-25 20:39:59,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 2.0262172284644193) internal successors, (541), 266 states have internal predecessors, (541), 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 20:39:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 591 transitions. [2021-11-25 20:39:59,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2021-11-25 20:39:59,904 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:39:59,905 INFO L514 BasicCegarLoop]: trace histogram [264, 264, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:39:59,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:00,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:00,119 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:40:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:00,119 INFO L85 PathProgramCache]: Analyzing trace with hash 156820385, now seen corresponding path program 2 times [2021-11-25 20:40:00,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:00,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715230865] [2021-11-25 20:40:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:00,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:23,481 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 20:40:23,481 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715230865] [2021-11-25 20:40:23,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715230865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:23,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943237905] [2021-11-25 20:40:23,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:40:23,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:23,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:23,482 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:23,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-25 20:40:23,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-11-25 20:40:23,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:40:23,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-25 20:40:23,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 69698 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69698 trivial. 0 not checked. [2021-11-25 20:40:28,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:40:28,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943237905] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:40:28,381 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:40:28,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [266] total 268 [2021-11-25 20:40:28,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695252263] [2021-11-25 20:40:28,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:40:28,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:40:28,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:40:28,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:40:28,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35515, Invalid=36577, Unknown=0, NotChecked=0, Total=72092 [2021-11-25 20:40:28,388 INFO L87 Difference]: Start difference. First operand 581 states and 591 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:40:28,392 INFO L93 Difference]: Finished difference Result 586 states and 597 transitions. [2021-11-25 20:40:28,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:40:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 541 [2021-11-25 20:40:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:40:28,395 INFO L225 Difference]: With dead ends: 586 [2021-11-25 20:40:28,395 INFO L226 Difference]: Without dead ends: 584 [2021-11-25 20:40:28,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 806 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=35515, Invalid=36577, Unknown=0, NotChecked=0, Total=72092 [2021-11-25 20:40:28,399 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:40:28,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 15 Unchecked, 0.0s Time] [2021-11-25 20:40:28,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-11-25 20:40:28,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 583. [2021-11-25 20:40:28,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 579 states have (on average 1.0241796200345423) internal successors, (593), 582 states have internal predecessors, (593), 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 20:40:28,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 593 transitions. [2021-11-25 20:40:28,411 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 593 transitions. Word has length 541 [2021-11-25 20:40:28,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:40:28,412 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 593 transitions. [2021-11-25 20:40:28,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:40:28,413 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 593 transitions. [2021-11-25 20:40:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-25 20:40:28,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:40:28,417 INFO L514 BasicCegarLoop]: trace histogram [264, 264, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 20:40:28,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-25 20:40:28,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:28,633 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-11-25 20:40:28,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:40:28,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2085700816, now seen corresponding path program 1 times [2021-11-25 20:40:28,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:40:28,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936013158] [2021-11-25 20:40:28,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:28,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:40:28,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 527 refuted. 0 times theorem prover too weak. 69177 trivial. 0 not checked. [2021-11-25 20:40:29,311 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:40:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936013158] [2021-11-25 20:40:29,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936013158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:40:29,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300085737] [2021-11-25 20:40:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:40:29,312 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:40:29,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:40:29,315 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:40:29,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_70ced115-1882-402a-9927-16697283fdf4/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-25 20:40:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:40:30,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 3540 conjuncts, 266 conjunts are in the unsatisfiable core [2021-11-25 20:40:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:40:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:40:53,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:42:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 69704 backedges. 0 proven. 69696 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-25 20:42:01,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300085737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:42:01,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093260258] [2021-11-25 20:42:01,678 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-25 20:42:01,678 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:42:01,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:42:01,679 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:42:01,679 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:42:01,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2021-11-25 20:42:01,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2021-11-25 20:42:01,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,795 INFO L354 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2021-11-25 20:42:01,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 259 treesize of output 247 [2021-11-25 20:42:01,845 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:42:01,875 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 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-25 20:42:01,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:01,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:42:01,954 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:42:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 49 [2021-11-25 20:42:02,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:42:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:42:02,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:42:02,101 INFO L354 Elim1Store]: treesize reduction 261, result has 12.4 percent of original size [2021-11-25 20:42:02,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 193 [2021-11-25 20:42:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:42:02,180 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:42:02,181 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 25 treesize of output 25 [2021-11-25 20:42:02,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:42:02,205 INFO L354 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2021-11-25 20:42:02,205 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 25 treesize of output 25 [2021-11-25 20:42:02,220 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:42:03,765 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31552#(and (= |ULTIMATE.start_main_~#dst~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~#src~0#1.base|) (= |ULTIMATE.start_main_~#src~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#dst~0#1.base|) (< (select |#length| |ULTIMATE.start_main_~#src~0#1.base|) (+ |ULTIMATE.start_main_~#src~0#1.offset| (* 4 |ULTIMATE.start_main_~i~0#1|) 4)) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 20:42:03,766 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:42:03,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:42:03,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 266, 266] total 534 [2021-11-25 20:42:03,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983792599] [2021-11-25 20:42:03,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:42:03,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 535 states [2021-11-25 20:42:03,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:42:03,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 535 interpolants. [2021-11-25 20:42:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143400, Invalid=149822, Unknown=0, NotChecked=0, Total=293222 [2021-11-25 20:42:03,797 INFO L87 Difference]: Start difference. First operand 583 states and 593 transitions. Second operand has 535 states, 535 states have (on average 2.0186915887850465) internal successors, (1080), 534 states have internal predecessors, (1080), 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)