./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:06:12,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:06:12,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:06:13,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:06:13,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:06:13,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:06:13,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:06:13,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:06:13,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:06:13,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:06:13,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:06:13,048 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:06:13,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:06:13,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:06:13,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:06:13,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:06:13,057 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:06:13,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:06:13,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:06:13,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:06:13,067 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:06:13,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:06:13,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:06:13,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:06:13,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:06:13,089 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:06:13,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:06:13,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:06:13,094 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:06:13,095 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:06:13,097 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:06:13,099 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:06:13,102 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:06:13,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:06:13,106 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:06:13,107 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:06:13,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:06:13,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:06:13,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:06:13,110 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:06:13,111 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:06:13,112 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:06:13,174 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:06:13,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:06:13,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:06:13,178 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:06:13,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:06:13,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:06:13,190 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:06:13,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:06:13,191 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:06:13,191 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:06:13,192 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:06:13,193 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:06:13,193 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:06:13,193 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:06:13,194 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:06:13,194 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:06:13,194 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:06:13,195 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:06:13,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:06:13,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:06:13,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:06:13,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:06:13,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:06:13,198 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:06:13,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:06:13,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:06:13,199 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:06:13,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:06:13,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:06:13,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:13,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:06:13,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:06:13,201 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:06:13,201 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:06:13,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:06:13,202 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:06:13,202 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:06:13,202 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:06:13,203 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_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62cb578dfe3af17ed98c8454048d798a874692901bcf05dac12a80fa481c23e6 [2021-11-23 02:06:13,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:06:13,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:06:13,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:06:13,606 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:06:13,607 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:06:13,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-23 02:06:13,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/data/b5054a89d/f431d702a9d7461f8de8938091fac3cb/FLAG6e2caee44 [2021-11-23 02:06:14,671 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:06:14,673 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-23 02:06:14,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/data/b5054a89d/f431d702a9d7461f8de8938091fac3cb/FLAG6e2caee44 [2021-11-23 02:06:15,094 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/data/b5054a89d/f431d702a9d7461f8de8938091fac3cb [2021-11-23 02:06:15,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:06:15,099 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:06:15,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:15,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:06:15,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:06:15,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:15" (1/1) ... [2021-11-23 02:06:15,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6467d609 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:15, skipping insertion in model container [2021-11-23 02:06:15,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:06:15" (1/1) ... [2021-11-23 02:06:15,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:06:15,232 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:06:16,938 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_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-23 02:06:16,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:17,034 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:06:17,442 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_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/sv-benchmarks/c/ldv-commit-tester/m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i[176586,176599] [2021-11-23 02:06:17,450 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:06:17,517 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:06:17,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17 WrapperNode [2021-11-23 02:06:17,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:06:17,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:17,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:06:17,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:06:17,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,762 INFO L137 Inliner]: procedures = 186, calls = 1465, calls flagged for inlining = 91, calls inlined = 88, statements flattened = 4139 [2021-11-23 02:06:17,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:06:17,764 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:06:17,764 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:06:17,764 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:06:17,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,776 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,944 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:17,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:18,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:18,107 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:06:18,108 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:06:18,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:06:18,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:06:18,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (1/1) ... [2021-11-23 02:06:18,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:06:18,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:18,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:06:18,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:06:18,216 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_sw [2021-11-23 02:06:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_sw [2021-11-23 02:06:18,216 INFO L130 BoogieDeclarations]: Found specification of procedure snd_card_file_remove [2021-11-23 02:06:18,216 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_card_file_remove [2021-11-23 02:06:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:06:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-23 02:06:18,217 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-23 02:06:18,217 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_recsrc2 [2021-11-23 02:06:18,217 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_recsrc2 [2021-11-23 02:06:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_find_numid [2021-11-23 02:06:18,218 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_find_numid [2021-11-23 02:06:18,218 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv [2021-11-23 02:06:18,218 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv [2021-11-23 02:06:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:06:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-23 02:06:18,219 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-23 02:06:18,219 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_input [2021-11-23 02:06:18,219 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_input [2021-11-23 02:06:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:06:18,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:06:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_size_call_parameter [2021-11-23 02:06:18,220 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:06:18,221 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:06:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_test_id [2021-11-23 02:06:18,221 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_test_id [2021-11-23 02:06:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:06:18,221 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-23 02:06:18,222 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-23 02:06:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:06:18,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:06:18,222 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:06:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:06:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_get_volume1_vol [2021-11-23 02:06:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_get_volume1_vol [2021-11-23 02:06:18,223 INFO L130 BoogieDeclarations]: Found specification of procedure snd_info_free_entry [2021-11-23 02:06:18,223 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_info_free_entry [2021-11-23 02:06:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 02:06:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 02:06:18,224 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-23 02:06:18,224 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-23 02:06:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_release [2021-11-23 02:06:18,225 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_release [2021-11-23 02:06:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:06:18,225 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv2 [2021-11-23 02:06:18,225 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv2 [2021-11-23 02:06:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_conv1 [2021-11-23 02:06:18,226 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_conv1 [2021-11-23 02:06:18,226 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-23 02:06:18,227 INFO L130 BoogieDeclarations]: Found specification of procedure up_read [2021-11-23 02:06:18,228 INFO L138 BoogieDeclarations]: Found implementation of procedure up_read [2021-11-23 02:06:18,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:06:18,230 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_held [2021-11-23 02:06:18,230 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_held [2021-11-23 02:06:18,231 INFO L130 BoogieDeclarations]: Found specification of procedure __kmalloc [2021-11-23 02:06:18,231 INFO L138 BoogieDeclarations]: Found implementation of procedure __kmalloc [2021-11-23 02:06:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:06:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:06:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-23 02:06:18,232 INFO L130 BoogieDeclarations]: Found specification of procedure mixer_slot_clear [2021-11-23 02:06:18,233 INFO L138 BoogieDeclarations]: Found implementation of procedure mixer_slot_clear [2021-11-23 02:06:18,234 INFO L130 BoogieDeclarations]: Found specification of procedure snd_ctl_notify [2021-11-23 02:06:18,234 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_ctl_notify [2021-11-23 02:06:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:06:18,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 02:06:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_ioctl1 [2021-11-23 02:06:18,235 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_ioctl1 [2021-11-23 02:06:18,235 INFO L130 BoogieDeclarations]: Found specification of procedure down_read [2021-11-23 02:06:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure down_read [2021-11-23 02:06:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-23 02:06:18,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_down_read_controls_rwsem_of_snd_card [2021-11-23 02:06:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:06:18,236 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-23 02:06:18,237 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-23 02:06:18,238 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-23 02:06:18,239 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-23 02:06:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_sw [2021-11-23 02:06:18,239 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_sw [2021-11-23 02:06:18,239 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-23 02:06:18,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_up_read_controls_rwsem_of_snd_card [2021-11-23 02:06:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:06:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:06:18,240 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_build_test [2021-11-23 02:06:18,241 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_build_test [2021-11-23 02:06:18,242 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-23 02:06:18,242 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-23 02:06:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-23 02:06:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-23 02:06:18,243 INFO L130 BoogieDeclarations]: Found specification of procedure snd_oss_info_register [2021-11-23 02:06:18,243 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_oss_info_register [2021-11-23 02:06:18,244 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_put_volume1_vol [2021-11-23 02:06:18,245 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_put_volume1_vol [2021-11-23 02:06:18,245 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_notify_handler [2021-11-23 02:06:18,246 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_notify_handler [2021-11-23 02:06:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:06:18,247 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:06:18,247 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-23 02:06:18,248 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-23 02:06:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:06:18,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:06:18,248 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_rcu_dereference [2021-11-23 02:06:18,248 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_rcu_dereference [2021-11-23 02:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure snd_mixer_oss_open [2021-11-23 02:06:18,249 INFO L138 BoogieDeclarations]: Found implementation of procedure snd_mixer_oss_open [2021-11-23 02:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:06:18,249 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:06:18,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:06:18,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:06:18,250 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:06:18,871 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:06:18,874 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:06:31,409 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:06:32,814 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:06:32,817 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:06:32,825 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:32 BoogieIcfgContainer [2021-11-23 02:06:32,825 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:06:32,827 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:06:32,827 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:06:32,832 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:06:32,832 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:06:15" (1/3) ... [2021-11-23 02:06:32,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2112d4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:32, skipping insertion in model container [2021-11-23 02:06:32,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:06:17" (2/3) ... [2021-11-23 02:06:32,843 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2112d4c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:06:32, skipping insertion in model container [2021-11-23 02:06:32,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:06:32" (3/3) ... [2021-11-23 02:06:32,847 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_sound-core-oss-snd-mixer-oss-ko--143_7a--506218e.i [2021-11-23 02:06:32,854 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:06:32,854 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:06:32,941 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:06:32,953 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:06:32,953 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:06:33,013 INFO L276 IsEmpty]: Start isEmpty. Operand has 843 states, 540 states have (on average 1.3925925925925926) internal successors, (752), 557 states have internal predecessors, (752), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2021-11-23 02:06:33,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:06:33,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:33,025 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:33,026 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:33,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2091663014, now seen corresponding path program 1 times [2021-11-23 02:06:33,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:33,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742588350] [2021-11-23 02:06:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:33,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:06:33,545 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742588350] [2021-11-23 02:06:33,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742588350] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:33,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:33,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:06:33,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078839602] [2021-11-23 02:06:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:33,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:33,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:33,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:33,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:33,599 INFO L87 Difference]: Start difference. First operand has 843 states, 540 states have (on average 1.3925925925925926) internal successors, (752), 557 states have internal predecessors, (752), 255 states have call successors, (255), 46 states have call predecessors, (255), 46 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:06:36,204 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:37,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:37,176 INFO L93 Difference]: Finished difference Result 1659 states and 2601 transitions. [2021-11-23 02:06:37,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:37,179 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:06:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:37,213 INFO L225 Difference]: With dead ends: 1659 [2021-11-23 02:06:37,217 INFO L226 Difference]: Without dead ends: 817 [2021-11-23 02:06:37,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:37,259 INFO L933 BasicCegarLoop]: 1092 mSDtfsCounter, 4 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2182 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:37,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2182 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-11-23 02:06:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-11-23 02:06:37,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 813. [2021-11-23 02:06:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 521 states have (on average 1.381957773512476) internal successors, (720), 534 states have internal predecessors, (720), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-23 02:06:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1211 transitions. [2021-11-23 02:06:37,539 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1211 transitions. Word has length 11 [2021-11-23 02:06:37,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:37,540 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1211 transitions. [2021-11-23 02:06:37,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:06:37,542 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1211 transitions. [2021-11-23 02:06:37,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:06:37,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:37,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:37,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:06:37,546 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:37,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1306889328, now seen corresponding path program 1 times [2021-11-23 02:06:37,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:37,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279747467] [2021-11-23 02:06:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:37,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:37,781 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:37,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279747467] [2021-11-23 02:06:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279747467] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:37,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:06:37,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:06:37,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630500701] [2021-11-23 02:06:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:37,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:37,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:37,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:37,793 INFO L87 Difference]: Start difference. First operand 813 states and 1211 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:06:40,124 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:41,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:41,099 INFO L93 Difference]: Finished difference Result 818 states and 1215 transitions. [2021-11-23 02:06:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:41,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-23 02:06:41,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:41,110 INFO L225 Difference]: With dead ends: 818 [2021-11-23 02:06:41,111 INFO L226 Difference]: Without dead ends: 813 [2021-11-23 02:06:41,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:06:41,114 INFO L933 BasicCegarLoop]: 1090 mSDtfsCounter, 29 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 2150 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:41,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 2150 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 02:06:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-11-23 02:06:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 813. [2021-11-23 02:06:41,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 521 states have (on average 1.3800383877159308) internal successors, (719), 534 states have internal predecessors, (719), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-23 02:06:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1210 transitions. [2021-11-23 02:06:41,215 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1210 transitions. Word has length 14 [2021-11-23 02:06:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:41,216 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1210 transitions. [2021-11-23 02:06:41,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:06:41,217 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1210 transitions. [2021-11-23 02:06:41,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:06:41,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:41,224 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:41,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:06:41,224 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1078520004, now seen corresponding path program 1 times [2021-11-23 02:06:41,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:41,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527283128] [2021-11-23 02:06:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:41,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:06:41,413 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527283128] [2021-11-23 02:06:41,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527283128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:41,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425079993] [2021-11-23 02:06:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:41,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:41,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:41,424 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:41,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:06:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:42,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:06:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:42,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:06:42,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425079993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:06:42,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:06:42,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:06:42,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755101854] [2021-11-23 02:06:42,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:06:42,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:06:42,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:06:42,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:06:42,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:42,333 INFO L87 Difference]: Start difference. First operand 813 states and 1210 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:06:45,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:06:45,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:06:45,132 INFO L93 Difference]: Finished difference Result 823 states and 1222 transitions. [2021-11-23 02:06:45,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:06:45,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2021-11-23 02:06:45,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:06:45,144 INFO L225 Difference]: With dead ends: 823 [2021-11-23 02:06:45,144 INFO L226 Difference]: Without dead ends: 818 [2021-11-23 02:06:45,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:06:45,148 INFO L933 BasicCegarLoop]: 1090 mSDtfsCounter, 4 mSDsluCounter, 1204 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 2178 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:06:45,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 2178 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:06:45,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2021-11-23 02:06:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 814. [2021-11-23 02:06:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 814 states, 522 states have (on average 1.3793103448275863) internal successors, (720), 535 states have internal predecessors, (720), 247 states have call successors, (247), 45 states have call predecessors, (247), 44 states have return successors, (244), 244 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-23 02:06:45,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 1211 transitions. [2021-11-23 02:06:45,225 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 1211 transitions. Word has length 21 [2021-11-23 02:06:45,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:06:45,227 INFO L470 AbstractCegarLoop]: Abstraction has 814 states and 1211 transitions. [2021-11-23 02:06:45,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:06:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 1211 transitions. [2021-11-23 02:06:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:06:45,230 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:06:45,230 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:06:45,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:06:45,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:45,431 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:06:45,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:06:45,432 INFO L85 PathProgramCache]: Analyzing trace with hash 12086339, now seen corresponding path program 1 times [2021-11-23 02:06:45,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:06:45,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132411192] [2021-11-23 02:06:45,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:45,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:06:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:45,618 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:06:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132411192] [2021-11-23 02:06:45,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132411192] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:06:45,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949353180] [2021-11-23 02:06:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:06:45,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:06:45,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:06:45,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:06:45,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:06:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:06:46,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:06:46,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:06:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:06:46,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:06:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:06:46,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949353180] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:06:46,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014770441] [2021-11-23 02:06:46,668 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:06:46,669 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:06:46,676 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:06:46,683 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:06:46,684 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:13,563 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_handler_precall with input of size 1461 for LOIs [2021-11-23 02:07:14,934 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:32,441 WARN L227 SmtUtils]: Spent 17.37s on a formula simplification that was a NOOP. DAG size: 1441 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:07:35,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1014770441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:35,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:35,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [4, 4, 4] total 19 [2021-11-23 02:07:35,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509014140] [2021-11-23 02:07:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:07:35,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:35,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:07:35,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-11-23 02:07:35,416 INFO L87 Difference]: Start difference. First operand 814 states and 1211 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:14,006 WARN L227 SmtUtils]: Spent 38.24s on a formula simplification. DAG size of input: 1444 DAG size of output: 1443 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:08:58,005 WARN L227 SmtUtils]: Spent 43.77s on a formula simplification. DAG size of input: 1457 DAG size of output: 1456 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:09:41,949 WARN L227 SmtUtils]: Spent 43.69s on a formula simplification. DAG size of input: 1457 DAG size of output: 1456 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:10:23,828 WARN L227 SmtUtils]: Spent 41.45s on a formula simplification. DAG size of input: 1448 DAG size of output: 1447 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:11:26,209 WARN L227 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 1454 DAG size of output: 1453 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:12:41,433 WARN L227 SmtUtils]: Spent 1.25m on a formula simplification. DAG size of input: 1450 DAG size of output: 1449 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:14:03,189 WARN L227 SmtUtils]: Spent 1.33m on a formula simplification. DAG size of input: 1458 DAG size of output: 1455 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:15:29,267 WARN L227 SmtUtils]: Spent 1.43m on a formula simplification. DAG size of input: 1471 DAG size of output: 1468 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:16:57,762 WARN L227 SmtUtils]: Spent 1.46m on a formula simplification. DAG size of input: 1471 DAG size of output: 1468 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:18:27,799 WARN L227 SmtUtils]: Spent 1.49m on a formula simplification. DAG size of input: 1458 DAG size of output: 1455 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:18:30,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:45,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:47,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:49,990 INFO L93 Difference]: Finished difference Result 2143 states and 3225 transitions. [2021-11-23 02:18:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-23 02:18:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2021-11-23 02:18:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:50,004 INFO L225 Difference]: With dead ends: 2143 [2021-11-23 02:18:50,005 INFO L226 Difference]: Without dead ends: 1331 [2021-11-23 02:18:50,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 669.8s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:18:50,013 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 813 mSDsluCounter, 5706 mSDsCounter, 0 mSdLazyCounter, 3211 mSolverCounterSat, 79 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 817 SdHoareTripleChecker+Valid, 6207 SdHoareTripleChecker+Invalid, 3292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3211 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:50,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [817 Valid, 6207 Invalid, 3292 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [79 Valid, 3211 Invalid, 2 Unknown, 0 Unchecked, 25.1s Time] [2021-11-23 02:18:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2021-11-23 02:18:50,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1279. [2021-11-23 02:18:50,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 838 states have (on average 1.3878281622911695) internal successors, (1163), 861 states have internal predecessors, (1163), 366 states have call successors, (366), 76 states have call predecessors, (366), 74 states have return successors, (401), 356 states have call predecessors, (401), 363 states have call successors, (401) [2021-11-23 02:18:50,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1930 transitions. [2021-11-23 02:18:50,181 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1930 transitions. Word has length 24 [2021-11-23 02:18:50,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:50,181 INFO L470 AbstractCegarLoop]: Abstraction has 1279 states and 1930 transitions. [2021-11-23 02:18:50,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:18:50,182 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1930 transitions. [2021-11-23 02:18:50,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:18:50,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:50,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:50,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:50,405 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1094625915, now seen corresponding path program 1 times [2021-11-23 02:18:50,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:50,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941857443] [2021-11-23 02:18:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:50,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:50,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:18:50,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [245510290] [2021-11-23 02:18:50,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:50,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:50,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:50,460 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:50,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:18:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:51,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 1842 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:18:51,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:51,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 02:18:51,204 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:18:51,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941857443] [2021-11-23 02:18:51,205 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:18:51,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245510290] [2021-11-23 02:18:51,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245510290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:51,205 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:51,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:18:51,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191601712] [2021-11-23 02:18:51,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:51,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:18:51,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:51,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:18:51,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:51,207 INFO L87 Difference]: Start difference. First operand 1279 states and 1930 transitions. Second operand has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:18:53,421 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:56,534 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:18:56,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:56,633 INFO L93 Difference]: Finished difference Result 2090 states and 3147 transitions. [2021-11-23 02:18:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:18:56,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2021-11-23 02:18:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:56,645 INFO L225 Difference]: With dead ends: 2090 [2021-11-23 02:18:56,645 INFO L226 Difference]: Without dead ends: 1280 [2021-11-23 02:18:56,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:56,651 INFO L933 BasicCegarLoop]: 1091 mSDtfsCounter, 0 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2179 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:56,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2179 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 237 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2021-11-23 02:18:56,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-11-23 02:18:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1280. [2021-11-23 02:18:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 839 states have (on average 1.3873659117997617) internal successors, (1164), 862 states have internal predecessors, (1164), 366 states have call successors, (366), 76 states have call predecessors, (366), 74 states have return successors, (401), 356 states have call predecessors, (401), 363 states have call successors, (401) [2021-11-23 02:18:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1931 transitions. [2021-11-23 02:18:56,781 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1931 transitions. Word has length 46 [2021-11-23 02:18:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:56,782 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1931 transitions. [2021-11-23 02:18:56,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.666666666666666) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:18:56,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1931 transitions. [2021-11-23 02:18:56,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:18:56,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:56,789 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:18:56,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:56,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:56,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:18:57,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:57,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1776546057, now seen corresponding path program 1 times [2021-11-23 02:18:57,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:18:57,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679887779] [2021-11-23 02:18:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:57,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:18:57,072 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 02:18:57,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393899722] [2021-11-23 02:18:57,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:57,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:57,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:57,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:18:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:57,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1848 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:18:57,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:18:57,950 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:18:57,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:18:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679887779] [2021-11-23 02:18:57,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:18:57,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393899722] [2021-11-23 02:18:57,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393899722] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:18:57,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:18:57,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:18:57,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507077231] [2021-11-23 02:18:57,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:18:57,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:18:57,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:18:57,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:18:57,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:18:57,953 INFO L87 Difference]: Start difference. First operand 1280 states and 1931 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:19:00,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:19:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:19:00,267 INFO L93 Difference]: Finished difference Result 1282 states and 1932 transitions. [2021-11-23 02:19:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:19:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 47 [2021-11-23 02:19:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:19:00,278 INFO L225 Difference]: With dead ends: 1282 [2021-11-23 02:19:00,278 INFO L226 Difference]: Without dead ends: 1279 [2021-11-23 02:19:00,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:19:00,279 INFO L933 BasicCegarLoop]: 1087 mSDtfsCounter, 1165 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1165 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:19:00,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1165 Valid, 1087 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 02:19:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2021-11-23 02:19:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1271. [2021-11-23 02:19:00,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1271 states, 837 states have (on average 1.3870967741935485) internal successors, (1161), 854 states have internal predecessors, (1161), 359 states have call successors, (359), 75 states have call predecessors, (359), 74 states have return successors, (395), 356 states have call predecessors, (395), 357 states have call successors, (395) [2021-11-23 02:19:00,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1271 states to 1271 states and 1915 transitions. [2021-11-23 02:19:00,404 INFO L78 Accepts]: Start accepts. Automaton has 1271 states and 1915 transitions. Word has length 47 [2021-11-23 02:19:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:19:00,404 INFO L470 AbstractCegarLoop]: Abstraction has 1271 states and 1915 transitions. [2021-11-23 02:19:00,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-23 02:19:00,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1271 states and 1915 transitions. [2021-11-23 02:19:00,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:19:00,408 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:19:00,408 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:19:00,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:19:00,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-23 02:19:00,636 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:19:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:19:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash 388945887, now seen corresponding path program 1 times [2021-11-23 02:19:00,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:19:00,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882746793] [2021-11-23 02:19:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:00,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:19:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:00,716 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:19:00,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882746793] [2021-11-23 02:19:00,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 02:19:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370515883] [2021-11-23 02:19:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:19:00,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:19:00,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:19:00,718 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:19:00,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_15b16aa8-aac2-4f42-9e0a-d0f56151a11f/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:19:01,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:19:01,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:19:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:19:01,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:19:01,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:19:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:19:01,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370515883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:01,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [602138161] [2021-11-23 02:19:01,653 INFO L159 IcfgInterpreter]: Started Sifa with 49 locations of interest [2021-11-23 02:19:01,654 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:19:01,654 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:19:01,654 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:19:01,654 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs