./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:31:57,098 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:31:57,101 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:31:57,160 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:31:57,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:31:57,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:31:57,171 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:31:57,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:31:57,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:31:57,180 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:31:57,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:31:57,182 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:31:57,183 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:31:57,184 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:31:57,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:31:57,193 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:31:57,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:31:57,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:31:57,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:31:57,215 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:31:57,217 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:31:57,221 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:31:57,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:31:57,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:31:57,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:31:57,231 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:31:57,232 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:31:57,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:31:57,235 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:31:57,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:31:57,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:31:57,238 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:31:57,240 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:31:57,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:31:57,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:31:57,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:31:57,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:31:57,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:31:57,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:31:57,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:31:57,246 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:31:57,247 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:31:57,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:31:57,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:31:57,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:31:57,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:31:57,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:31:57,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:31:57,288 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:31:57,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:31:57,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:31:57,289 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:31:57,290 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:31:57,290 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:31:57,290 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:31:57,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:31:57,291 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:31:57,291 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:31:57,291 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:31:57,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:31:57,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:31:57,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:31:57,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:31:57,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:31:57,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:31:57,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:31:57,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:31:57,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:31:57,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:31:57,296 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:31:57,296 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:31:57,296 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:31:57,296 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:31:57,297 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:31:57,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:57,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:31:57,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:31:57,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:31:57,299 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2021-11-23 17:31:57,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:31:57,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:31:57,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:31:57,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:31:57,636 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:31:57,637 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-23 17:31:57,717 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/44911dca6/c5422751e38a4945834de37a75dc0227/FLAG44d7b5e0b [2021-11-23 17:31:58,186 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:31:58,187 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-23 17:31:58,201 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/44911dca6/c5422751e38a4945834de37a75dc0227/FLAG44d7b5e0b [2021-11-23 17:31:58,564 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/44911dca6/c5422751e38a4945834de37a75dc0227 [2021-11-23 17:31:58,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:31:58,568 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:31:58,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:58,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:31:58,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:31:58,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:58" (1/1) ... [2021-11-23 17:31:58,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f3fcdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:58, skipping insertion in model container [2021-11-23 17:31:58,577 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:31:58" (1/1) ... [2021-11-23 17:31:58,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:31:58,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:31:58,873 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-23 17:31:58,933 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-23 17:31:58,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:58,946 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:31:58,977 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-23 17:31:59,007 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-23 17:31:59,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:31:59,030 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:31:59,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59 WrapperNode [2021-11-23 17:31:59,031 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:31:59,033 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:59,033 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:31:59,033 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:31:59,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,081 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 82 [2021-11-23 17:31:59,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:31:59,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:31:59,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:31:59,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:31:59,093 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,094 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,096 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:31:59,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:31:59,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:31:59,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:31:59,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:31:59" (1/1) ... [2021-11-23 17:31:59,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:31:59,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:31:59,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:31:59,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:31:59,201 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:31:59,201 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 17:31:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 17:31:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 17:31:59,202 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 17:31:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:31:59,202 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:31:59,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:31:59,294 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:31:59,296 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:31:59,610 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:31:59,636 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:31:59,641 INFO L158 Benchmark]: Toolchain (without parser) took 1072.37ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 64.4MB in the beginning and 88.4MB in the end (delta: -24.0MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-23 17:31:59,642 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:31:59,643 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.59ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 64.2MB in the beginning and 102.8MB in the end (delta: -38.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 17:31:59,644 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.38ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 101.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:59,645 INFO L158 Benchmark]: Boogie Preprocessor took 30.70ms. Allocated memory is still 127.9MB. Free memory was 101.1MB in the beginning and 99.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:31:59,646 INFO L158 Benchmark]: RCFGBuilder took 524.91ms. Allocated memory is still 127.9MB. Free memory was 99.9MB in the beginning and 88.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:31:59,649 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 96.5MB. Free memory is still 50.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 462.59ms. Allocated memory was 96.5MB in the beginning and 127.9MB in the end (delta: 31.5MB). Free memory was 64.2MB in the beginning and 102.8MB in the end (delta: -38.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.38ms. Allocated memory is still 127.9MB. Free memory was 102.8MB in the beginning and 101.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.70ms. Allocated memory is still 127.9MB. Free memory was 101.1MB in the beginning and 99.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 524.91ms. Allocated memory is still 127.9MB. Free memory was 99.9MB in the beginning and 88.4MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:31:59,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:32:02,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:32:02,581 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:32:02,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:32:02,654 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:32:02,659 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:32:02,661 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:32:02,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:32:02,667 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:32:02,668 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:32:02,670 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:32:02,672 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:32:02,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:32:02,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:32:02,677 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:32:02,679 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:32:02,681 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:32:02,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:32:02,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:32:02,689 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:32:02,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:32:02,702 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:32:02,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:32:02,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:32:02,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:32:02,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:32:02,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:32:02,723 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:32:02,724 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:32:02,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:32:02,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:32:02,728 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:32:02,730 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:32:02,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:32:02,734 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:32:02,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:32:02,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:32:02,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:32:02,737 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:32:02,739 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:32:02,740 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:32:02,747 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:32:02,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:32:02,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:32:02,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:32:02,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:32:02,808 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:32:02,808 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:32:02,809 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:32:02,809 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:32:02,809 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:32:02,810 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:32:02,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:32:02,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:32:02,813 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:32:02,813 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:32:02,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:32:02,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:32:02,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:32:02,814 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:32:02,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:32:02,815 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:32:02,815 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:32:02,816 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:32:02,816 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:32:02,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:32:02,816 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:32:02,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:32:02,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:32:02,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:32:02,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:32:02,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:32:02,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:32:02,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:32:02,819 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:32:02,819 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:32:02,820 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:02,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:32:02,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:32:02,821 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:32:02,821 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb60664eb219cfca617a3a97a655d40aa192b004d90693207c446e4cc68b6381 [2021-11-23 17:32:03,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:32:03,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:32:03,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:32:03,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:32:03,360 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:32:03,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-23 17:32:03,442 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/b2957099c/eeb8fc73726e4b29b7b6a9694daba186/FLAG0b59b578e [2021-11-23 17:32:04,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:32:04,075 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i [2021-11-23 17:32:04,084 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/b2957099c/eeb8fc73726e4b29b7b6a9694daba186/FLAG0b59b578e [2021-11-23 17:32:04,373 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/data/b2957099c/eeb8fc73726e4b29b7b6a9694daba186 [2021-11-23 17:32:04,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:32:04,378 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:32:04,380 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:32:04,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:32:04,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:32:04,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,389 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ed51f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04, skipping insertion in model container [2021-11-23 17:32:04,390 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:32:04,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:32:04,624 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-23 17:32:04,656 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-23 17:32:04,658 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:32:04,672 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:32:04,687 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[1226,1239] [2021-11-23 17:32:04,701 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_8a65e63d-90bf-438c-a03f-9f965fe6b274/sv-benchmarks/c/combinations/gcd_1+newton_3_8.i[2828,2841] [2021-11-23 17:32:04,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:32:04,720 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:32:04,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04 WrapperNode [2021-11-23 17:32:04,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:32:04,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:32:04,723 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:32:04,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:32:04,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,793 INFO L137 Inliner]: procedures = 28, calls = 18, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 77 [2021-11-23 17:32:04,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:32:04,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:32:04,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:32:04,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:32:04,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,840 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,862 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:32:04,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:32:04,867 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:32:04,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:32:04,868 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (1/1) ... [2021-11-23 17:32:04,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:32:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:04,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:32:04,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:32:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:32:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:32:04,968 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2021-11-23 17:32:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2021-11-23 17:32:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-11-23 17:32:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-11-23 17:32:04,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:32:04,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:32:05,088 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:32:05,090 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:32:16,224 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:32:16,231 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:32:16,231 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:32:16,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:32:16 BoogieIcfgContainer [2021-11-23 17:32:16,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:32:16,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:32:16,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:32:16,237 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:32:16,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:32:04" (1/3) ... [2021-11-23 17:32:16,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2582fdf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:32:16, skipping insertion in model container [2021-11-23 17:32:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:32:04" (2/3) ... [2021-11-23 17:32:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2582fdf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:32:16, skipping insertion in model container [2021-11-23 17:32:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:32:16" (3/3) ... [2021-11-23 17:32:16,241 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_1+newton_3_8.i [2021-11-23 17:32:16,247 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:32:16,248 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 17:32:16,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:32:16,324 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 17:32:16,325 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 17:32:16,341 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:32:16,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:32:16,349 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:16,350 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:16,350 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:16,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:16,356 INFO L85 PathProgramCache]: Analyzing trace with hash -247750664, now seen corresponding path program 1 times [2021-11-23 17:32:16,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:16,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1329496567] [2021-11-23 17:32:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:16,370 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:16,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:16,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:16,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:32:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 17:32:16,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:16,574 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 17:32:16,575 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:16,575 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:16,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1329496567] [2021-11-23 17:32:16,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1329496567] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:16,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:16,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:32:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105580735] [2021-11-23 17:32:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:16,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 17:32:16,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:16,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 17:32:16,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:32:16,614 INFO L87 Difference]: Start difference. First operand has 40 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 31 states have internal predecessors, (40), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:16,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:16,637 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2021-11-23 17:32:16,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 17:32:16,639 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:32:16,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:16,647 INFO L225 Difference]: With dead ends: 72 [2021-11-23 17:32:16,647 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 17:32:16,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 17:32:16,654 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:16,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 17:32:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 17:32:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 17:32:16,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:32:16,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-11-23 17:32:16,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-11-23 17:32:16,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:16,695 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-11-23 17:32:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-11-23 17:32:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 17:32:16,697 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:16,697 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:16,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:16,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:16,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:16,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:16,912 INFO L85 PathProgramCache]: Analyzing trace with hash -251444748, now seen corresponding path program 1 times [2021-11-23 17:32:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1794243212] [2021-11-23 17:32:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:16,915 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:16,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:32:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:16,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:32:16,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:17,157 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 17:32:17,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:32:17,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:17,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1794243212] [2021-11-23 17:32:17,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1794243212] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:32:17,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:32:17,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:32:17,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756030833] [2021-11-23 17:32:17,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:32:17,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:32:17,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:32:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:32:17,162 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:17,229 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2021-11-23 17:32:17,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:32:17,230 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 17:32:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:17,231 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:32:17,231 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 17:32:17,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 17:32:17,233 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:17,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 17:32:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 17:32:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 17:32:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:32:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2021-11-23 17:32:17,243 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 11 [2021-11-23 17:32:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:17,244 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2021-11-23 17:32:17,244 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2021-11-23 17:32:17,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 17:32:17,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:17,249 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:17,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:17,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:32:17,465 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:17,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1673157840, now seen corresponding path program 1 times [2021-11-23 17:32:17,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712240800] [2021-11-23 17:32:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:17,466 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:17,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:17,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:32:17,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:17,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:32:17,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:17,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:18,195 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:18,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712240800] [2021-11-23 17:32:18,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712240800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:18,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [395706058] [2021-11-23 17:32:18,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:18,196 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:18,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:18,203 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:18,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:32:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:32:18,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:18,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:18,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:18,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [395706058] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:18,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92701547] [2021-11-23 17:32:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:32:18,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:18,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:18,846 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:18,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:32:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:32:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:32:18,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:19,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:19,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92701547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:19,749 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:32:19,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 7] total 11 [2021-11-23 17:32:19,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423636482] [2021-11-23 17:32:19,750 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:32:19,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:32:19,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:32:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:32:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:32:19,754 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:20,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:32:20,388 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-23 17:32:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:32:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 17:32:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:32:20,391 INFO L225 Difference]: With dead ends: 39 [2021-11-23 17:32:20,391 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 17:32:20,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:32:20,393 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:32:20,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 241 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:32:20,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 17:32:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 17:32:20,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:32:20,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-11-23 17:32:20,402 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 12 [2021-11-23 17:32:20,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:32:20,403 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-11-23 17:32:20,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:32:20,403 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-11-23 17:32:20,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 17:32:20,404 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:32:20,404 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:32:20,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:32:20,620 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-11-23 17:32:20,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-11-23 17:32:21,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:21,019 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:32:21,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:32:21,020 INFO L85 PathProgramCache]: Analyzing trace with hash -276630798, now seen corresponding path program 2 times [2021-11-23 17:32:21,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:32:21,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170558154] [2021-11-23 17:32:21,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:32:21,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:32:21,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:32:21,024 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:32:21,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:32:22,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:32:22,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:22,333 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 17:32:22,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:29,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:47,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:47,483 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:32:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170558154] [2021-11-23 17:32:47,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170558154] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:47,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [894333018] [2021-11-23 17:32:47,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:32:47,484 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:32:47,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:32:47,489 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:32:47,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:32:48,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:32:48,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:32:48,263 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 17:32:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:32:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:51,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:32:59,482 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:32:59,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [894333018] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:32:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082644547] [2021-11-23 17:32:59,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 17:32:59,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:32:59,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:32:59,484 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:32:59,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 17:33:01,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 17:33:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 17:33:01,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 17:33:01,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:05,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:33:17,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082644547] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:17,428 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:33:17,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 5, 9, 5, 10] total 16 [2021-11-23 17:33:17,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989515247] [2021-11-23 17:33:17,429 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:33:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 17:33:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:33:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 17:33:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=176, Unknown=3, NotChecked=0, Total=240 [2021-11-23 17:33:17,431 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:19,127 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:33:28,651 WARN L227 SmtUtils]: Spent 6.03s on a formula simplification. DAG size of input: 39 DAG size of output: 38 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:33:36,269 WARN L227 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:33:52,811 WARN L227 SmtUtils]: Spent 5.76s on a formula simplification. DAG size of input: 45 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 17:33:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:33:53,470 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2021-11-23 17:33:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 17:33:53,495 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-23 17:33:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:33:53,496 INFO L225 Difference]: With dead ends: 47 [2021-11-23 17:33:53,496 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 17:33:53,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 68.9s TimeCoverageRelationStatistics Valid=110, Invalid=266, Unknown=4, NotChecked=0, Total=380 [2021-11-23 17:33:53,498 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:33:53,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 278 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 39 Invalid, 0 Unknown, 13 Unchecked, 3.1s Time] [2021-11-23 17:33:53,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 17:33:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 17:33:53,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:33:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-23 17:33:53,507 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 13 [2021-11-23 17:33:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:33:53,508 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-23 17:33:53,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:33:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-23 17:33:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 17:33:53,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:33:53,510 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:33:53,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:53,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:53,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:33:54,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:33:54,120 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:33:54,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:33:54,120 INFO L85 PathProgramCache]: Analyzing trace with hash -326992466, now seen corresponding path program 1 times [2021-11-23 17:33:54,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:33:54,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1748045318] [2021-11-23 17:33:54,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:54,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:33:54,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:33:54,122 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:33:54,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:33:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:54,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:33:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:54,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:33:55,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:55,383 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:33:55,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1748045318] [2021-11-23 17:33:55,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1748045318] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:33:55,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1368063121] [2021-11-23 17:33:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:33:55,384 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:33:55,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:33:55,385 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:33:55,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:33:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:33:56,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 17:33:56,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:33:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:33:58,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:08,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:08,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1368063121] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:08,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326665746] [2021-11-23 17:34:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:08,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:34:08,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:34:08,434 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:34:08,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:34:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:34:10,286 WARN L261 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 17:34:10,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:34:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 17:34:13,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:34:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:34:41,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326665746] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:34:41,075 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:34:41,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 7, 5, 11] total 25 [2021-11-23 17:34:41,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248506020] [2021-11-23 17:34:41,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:34:41,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 17:34:41,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:34:41,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 17:34:41,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:34:41,079 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:43,693 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:34:43,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:34:43,742 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2021-11-23 17:34:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:34:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 17:34:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:34:43,760 INFO L225 Difference]: With dead ends: 35 [2021-11-23 17:34:43,760 INFO L226 Difference]: Without dead ends: 23 [2021-11-23 17:34:43,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-11-23 17:34:43,762 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:34:43,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 265 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 24 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 17:34:43,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-23 17:34:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-23 17:34:43,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:34:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-23 17:34:43,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-23 17:34:43,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:34:43,770 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-23 17:34:43,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:34:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-23 17:34:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 17:34:43,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:34:43,772 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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 17:34:43,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:43,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:44,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:44,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:44,373 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:34:44,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:34:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash -614441937, now seen corresponding path program 1 times [2021-11-23 17:34:44,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:34:44,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1442233020] [2021-11-23 17:34:44,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:34:44,374 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:34:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:34:44,377 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:34:44,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:34:44,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:34:44,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:34:44,592 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:34:44,595 INFO L158 Benchmark]: Toolchain (without parser) took 160216.53ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 38.3MB in the beginning and 24.3MB in the end (delta: 14.0MB). Peak memory consumption was 31.8MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,595 INFO L158 Benchmark]: CDTParser took 0.43ms. Allocated memory is still 58.7MB. Free memory is still 39.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:34:44,595 INFO L158 Benchmark]: CACSL2BoogieTranslator took 341.72ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 26.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,596 INFO L158 Benchmark]: Boogie Procedure Inliner took 71.80ms. Allocated memory is still 58.7MB. Free memory was 26.3MB in the beginning and 42.1MB in the end (delta: -15.9MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,597 INFO L158 Benchmark]: Boogie Preprocessor took 70.36ms. Allocated memory is still 58.7MB. Free memory was 42.1MB in the beginning and 40.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,597 INFO L158 Benchmark]: RCFGBuilder took 11366.06ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 29.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,598 INFO L158 Benchmark]: TraceAbstraction took 148359.67ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 29.4MB in the beginning and 24.3MB in the end (delta: 5.1MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-11-23 17:34:44,599 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.43ms. Allocated memory is still 58.7MB. Free memory is still 39.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 341.72ms. Allocated memory is still 58.7MB. Free memory was 38.1MB in the beginning and 26.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 71.80ms. Allocated memory is still 58.7MB. Free memory was 26.3MB in the beginning and 42.1MB in the end (delta: -15.9MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 70.36ms. Allocated memory is still 58.7MB. Free memory was 42.1MB in the beginning and 40.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 11366.06ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 29.8MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 148359.67ms. Allocated memory was 58.7MB in the beginning and 73.4MB in the end (delta: 14.7MB). Free memory was 29.4MB in the beginning and 24.3MB in the end (delta: 5.1MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:34:44,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8a65e63d-90bf-438c-a03f-9f965fe6b274/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable