./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:14:05,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:14:05,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:14:05,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:14:05,167 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:14:05,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:14:05,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:14:05,176 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:14:05,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:14:05,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:14:05,183 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:14:05,185 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:14:05,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:14:05,187 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:14:05,189 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:14:05,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:14:05,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:14:05,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:14:05,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:14:05,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:14:05,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:14:05,206 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:14:05,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:14:05,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:14:05,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:14:05,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:14:05,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:14:05,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:14:05,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:14:05,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:14:05,219 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:14:05,221 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:14:05,222 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:14:05,223 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:14:05,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:14:05,225 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:14:05,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:14:05,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:14:05,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:14:05,229 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:14:05,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:14:05,231 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-24 10:14:05,262 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:14:05,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:14:05,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:14:05,265 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:14:05,265 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:14:05,266 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:14:05,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:14:05,267 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:14:05,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:14:05,268 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:14:05,268 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:14:05,268 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:14:05,269 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:14:05,270 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:14:05,270 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:14:05,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 10:14:05,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 10:14:05,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:14:05,272 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:14:05,272 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:14:05,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:14:05,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:14:05,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:14:05,273 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 10:14:05,274 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 10:14:05,274 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 10:14:05,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:14:05,275 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:14:05,284 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:14:05,284 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:14:05,285 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:14:05,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:14:05,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:14:05,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:14:05,286 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:14:05,286 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:14:05,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:14:05,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:14:05,287 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:14:05,287 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-24 10:14:05,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:14:05,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:14:05,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:14:05,742 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:14:05,744 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:14:05,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-24 10:14:05,823 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/0d93890ff/8de0c61f09674f2da84c687063309af7/FLAG3d2ab90e8 [2021-10-24 10:14:06,382 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:14:06,382 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i [2021-10-24 10:14:06,396 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/0d93890ff/8de0c61f09674f2da84c687063309af7/FLAG3d2ab90e8 [2021-10-24 10:14:06,704 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/0d93890ff/8de0c61f09674f2da84c687063309af7 [2021-10-24 10:14:06,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:14:06,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:14:06,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:14:06,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:14:06,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:14:06,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:14:06" (1/1) ... [2021-10-24 10:14:06,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@277aee01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:06, skipping insertion in model container [2021-10-24 10:14:06,720 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:14:06" (1/1) ... [2021-10-24 10:14:06,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:14:06,809 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:14:07,170 WARN L228 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-24 10:14:07,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:14:07,185 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:14:07,239 WARN L228 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-24 10:14:07,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:14:07,288 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:14:07,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07 WrapperNode [2021-10-24 10:14:07,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:14:07,290 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:14:07,290 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:14:07,290 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:14:07,299 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,376 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:14:07,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:14:07,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:14:07,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:14:07,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,399 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,399 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,414 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:14:07,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:14:07,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:14:07,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:14:07,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (1/1) ... [2021-10-24 10:14:07,432 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:14:07,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:14:07,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:14:07,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:14:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-24 10:14:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-24 10:14:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:14:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:14:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:14:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:14:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:14:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:14:07,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:14:08,087 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:14:08,088 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-24 10:14:08,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:08 BoogieIcfgContainer [2021-10-24 10:14:08,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:14:08,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:14:08,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:14:08,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:14:08,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:14:06" (1/3) ... [2021-10-24 10:14:08,100 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1d8904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:14:08, skipping insertion in model container [2021-10-24 10:14:08,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:07" (2/3) ... [2021-10-24 10:14:08,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e1d8904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:14:08, skipping insertion in model container [2021-10-24 10:14:08,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:08" (3/3) ... [2021-10-24 10:14:08,104 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-24 10:14:08,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:14:08,112 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-24 10:14:08,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:14:08,188 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:14:08,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-24 10:14:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 34 states have internal predecessors, (40), 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) [2021-10-24 10:14:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:14:08,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:08,221 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:14:08,221 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:08,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:08,237 INFO L82 PathProgramCache]: Analyzing trace with hash 3603111, now seen corresponding path program 1 times [2021-10-24 10:14:08,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:08,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132555838] [2021-10-24 10:14:08,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:08,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:08,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:08,486 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:08,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132555838] [2021-10-24 10:14:08,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132555838] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:08,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:08,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:14:08,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850277539] [2021-10-24 10:14:08,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-24 10:14:08,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:08,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-24 10:14:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:14:08,558 INFO L87 Difference]: Start difference. First operand has 35 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:14:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:08,598 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-24 10:14:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-24 10:14:08,599 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2021-10-24 10:14:08,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:08,615 INFO L225 Difference]: With dead ends: 35 [2021-10-24 10:14:08,616 INFO L226 Difference]: Without dead ends: 32 [2021-10-24 10:14:08,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-24 10:14:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-24 10:14:08,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-24 10:14:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 2.0625) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:08,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-24 10:14:08,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 4 [2021-10-24 10:14:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:08,662 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-24 10:14:08,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:14:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-24 10:14:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:14:08,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:08,664 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:14:08,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:14:08,665 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash 111671684, now seen corresponding path program 1 times [2021-10-24 10:14:08,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:08,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030085228] [2021-10-24 10:14:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:08,674 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:08,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:08,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:08,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:08,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030085228] [2021-10-24 10:14:08,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030085228] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:08,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:08,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:14:08,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589177781] [2021-10-24 10:14:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:14:08,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:08,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:14:08,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:14:08,811 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:08,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:08,939 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2021-10-24 10:14:08,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:14:08,940 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:14:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:08,941 INFO L225 Difference]: With dead ends: 39 [2021-10-24 10:14:08,941 INFO L226 Difference]: Without dead ends: 39 [2021-10-24 10:14:08,942 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-24 10:14:08,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-10-24 10:14:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 33 states have internal predecessors, (40), 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) [2021-10-24 10:14:08,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-10-24 10:14:08,951 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 5 [2021-10-24 10:14:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:08,952 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-10-24 10:14:08,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:08,953 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-10-24 10:14:08,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:14:08,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:08,955 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:14:08,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:14:08,958 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:08,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:08,960 INFO L82 PathProgramCache]: Analyzing trace with hash 111671685, now seen corresponding path program 1 times [2021-10-24 10:14:08,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:08,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882448842] [2021-10-24 10:14:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:08,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:09,108 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:09,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882448842] [2021-10-24 10:14:09,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882448842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:09,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:09,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:14:09,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217266078] [2021-10-24 10:14:09,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:14:09,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:09,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:14:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:14:09,111 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:09,211 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-10-24 10:14:09,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:14:09,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:14:09,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:09,214 INFO L225 Difference]: With dead ends: 44 [2021-10-24 10:14:09,215 INFO L226 Difference]: Without dead ends: 44 [2021-10-24 10:14:09,216 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:09,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-24 10:14:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-10-24 10:14:09,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 39 states have internal predecessors, (44), 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) [2021-10-24 10:14:09,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-10-24 10:14:09,224 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 5 [2021-10-24 10:14:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:09,225 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-10-24 10:14:09,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-10-24 10:14:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-24 10:14:09,227 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:09,228 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:09,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:14:09,229 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:09,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1788460570, now seen corresponding path program 1 times [2021-10-24 10:14:09,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:09,233 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825082550] [2021-10-24 10:14:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:09,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:09,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:09,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825082550] [2021-10-24 10:14:09,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825082550] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:09,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:09,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:14:09,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98697364] [2021-10-24 10:14:09,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:14:09,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:09,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:14:09,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:14:09,317 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:09,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:09,391 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-24 10:14:09,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:14:09,392 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-24 10:14:09,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:09,397 INFO L225 Difference]: With dead ends: 42 [2021-10-24 10:14:09,397 INFO L226 Difference]: Without dead ends: 42 [2021-10-24 10:14:09,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:09,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-24 10:14:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-10-24 10:14:09,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 39 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) [2021-10-24 10:14:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-10-24 10:14:09,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 8 [2021-10-24 10:14:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:09,413 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-10-24 10:14:09,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-10-24 10:14:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-24 10:14:09,415 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:09,415 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:14:09,415 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:09,416 INFO L82 PathProgramCache]: Analyzing trace with hash -724750218, now seen corresponding path program 1 times [2021-10-24 10:14:09,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:09,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385730393] [2021-10-24 10:14:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:09,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:09,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:09,578 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:09,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385730393] [2021-10-24 10:14:09,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385730393] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:09,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:09,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-24 10:14:09,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505642248] [2021-10-24 10:14:09,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:14:09,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:09,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:14:09,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:14:09,583 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-10-24 10:14:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:09,692 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-10-24 10:14:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:14:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-24 10:14:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:09,696 INFO L225 Difference]: With dead ends: 46 [2021-10-24 10:14:09,697 INFO L226 Difference]: Without dead ends: 46 [2021-10-24 10:14:09,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:14:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-24 10:14:09,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2021-10-24 10:14:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 42 states have internal predecessors, (46), 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) [2021-10-24 10:14:09,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-24 10:14:09,713 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 10 [2021-10-24 10:14:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-24 10:14:09,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 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) [2021-10-24 10:14:09,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-24 10:14:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:14:09,715 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:09,716 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:09,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-24 10:14:09,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:09,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash 375559554, now seen corresponding path program 1 times [2021-10-24 10:14:09,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:09,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909579833] [2021-10-24 10:14:09,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:09,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:09,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:09,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:09,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909579833] [2021-10-24 10:14:09,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909579833] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:09,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:09,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:14:09,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388521087] [2021-10-24 10:14:09,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:14:09,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:14:09,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:09,791 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-10-24 10:14:09,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:09,897 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-10-24 10:14:09,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:14:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 [2021-10-24 10:14:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:09,899 INFO L225 Difference]: With dead ends: 53 [2021-10-24 10:14:09,899 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 10:14:09,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:14:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 10:14:09,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-10-24 10:14:09,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-10-24 10:14:09,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-24 10:14:09,904 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 11 [2021-10-24 10:14:09,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:09,905 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-24 10:14:09,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-10-24 10:14:09,905 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-24 10:14:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:14:09,906 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:09,906 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:09,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-24 10:14:09,907 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:09,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:09,907 INFO L82 PathProgramCache]: Analyzing trace with hash 375559555, now seen corresponding path program 1 times [2021-10-24 10:14:09,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:09,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067959613] [2021-10-24 10:14:09,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:09,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:10,024 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:10,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067959613] [2021-10-24 10:14:10,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067959613] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:10,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:10,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-24 10:14:10,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897421319] [2021-10-24 10:14:10,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-24 10:14:10,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:10,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-24 10:14:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:10,028 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-10-24 10:14:10,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:10,158 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2021-10-24 10:14:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:14:10,159 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 [2021-10-24 10:14:10,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:10,159 INFO L225 Difference]: With dead ends: 48 [2021-10-24 10:14:10,160 INFO L226 Difference]: Without dead ends: 48 [2021-10-24 10:14:10,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:14:10,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-24 10:14:10,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 32. [2021-10-24 10:14:10,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:10,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-10-24 10:14:10,163 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 11 [2021-10-24 10:14:10,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:10,164 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-10-24 10:14:10,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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) [2021-10-24 10:14:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-10-24 10:14:10,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:14:10,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:10,165 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:10,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-24 10:14:10,165 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:10,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:10,166 INFO L82 PathProgramCache]: Analyzing trace with hash -700084662, now seen corresponding path program 1 times [2021-10-24 10:14:10,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:10,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803219676] [2021-10-24 10:14:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:10,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:10,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:10,252 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:14:10,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803219676] [2021-10-24 10:14:10,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803219676] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:14:10,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743909189] [2021-10-24 10:14:10,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:10,253 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:14:10,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:14:10,255 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:14:10,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:14:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:10,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-24 10:14:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 10:14:10,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 10:14:10,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-24 10:14:10,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-24 10:14:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:10,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:10,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 56 [2021-10-24 10:14:10,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 48 [2021-10-24 10:14:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:11,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743909189] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:14:11,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2093038426] [2021-10-24 10:14:11,240 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-24 10:14:11,240 INFO L166 IcfgInterpreter]: Building call graph [2021-10-24 10:14:11,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-24 10:14:11,260 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-24 10:14:11,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-24 10:14:11,301 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,303 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,304 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,305 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-24 10:14:11,307 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,308 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-24 10:14:11,311 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 113 [2021-10-24 10:14:11,326 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_38|], 10=[|v_#valid_43|]} [2021-10-24 10:14:11,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-24 10:14:11,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:14:11,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:14:11,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-24 10:14:11,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,388 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:14:11,389 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,390 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-24 10:14:11,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,402 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,404 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 97 [2021-10-24 10:14:11,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,405 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:110, output treesize:97 [2021-10-24 10:14:11,422 INFO L180 QuantifierPusher]: treesize reduction 17, result has 86.3 percent of original size [2021-10-24 10:14:11,430 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 103 [2021-10-24 10:14:11,437 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,439 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,439 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,441 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-24 10:14:11,446 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,447 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,448 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-10-24 10:14:11,450 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-10-24 10:14:11,458 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 163 [2021-10-24 10:14:11,485 INFO L446 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.offset_26|, |v_#memory_$Pointer$.base_26|], 6=[|v_#memory_int_23|]} [2021-10-24 10:14:11,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-10-24 10:14:11,499 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,500 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 10:14:11,500 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,501 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 10:14:11,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,502 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-10-24 10:14:11,537 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,537 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 10:14:11,538 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,538 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-24 10:14:11,539 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-10-24 10:14:11,572 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,583 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 10:14:11,585 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,586 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 10:14:11,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,612 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,618 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 125 [2021-10-24 10:14:11,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,623 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:159, output treesize:125 [2021-10-24 10:14:11,636 INFO L180 QuantifierPusher]: treesize reduction 12, result has 93.7 percent of original size [2021-10-24 10:14:11,655 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-10-24 10:14:11,659 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,660 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-10-24 10:14:11,661 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-24 10:14:11,661 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,662 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-10-24 10:14:11,672 INFO L185 QuantifierPusher]: treesize reduction 3, result has 98.3 percent of original size 171 [2021-10-24 10:14:11,677 INFO L446 ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_27|, |v_#memory_$Pointer$.offset_27|], 12=[|v_#memory_int_24|]} [2021-10-24 10:14:11,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:11,688 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,689 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:14:11,689 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,690 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:14:11,690 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:11,710 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,710 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:14:11,711 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,711 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-24 10:14:11,712 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:11,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-10-24 10:14:11,742 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,744 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 10:14:11,745 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,747 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 24 [2021-10-24 10:14:11,747 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,774 INFO L180 QuantifierPusher]: treesize reduction 3, result has 97.9 percent of original size [2021-10-24 10:14:11,778 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 140 [2021-10-24 10:14:11,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-24 10:14:11,781 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:170, output treesize:140 [2021-10-24 10:14:11,802 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:11,808 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 171 [2021-10-24 10:14:11,834 INFO L180 QuantifierPusher]: treesize reduction 12, result has 94.1 percent of original size [2021-10-24 10:14:11,843 INFO L185 QuantifierPusher]: treesize reduction 12, result has 92.7 percent of original size 152 [2021-10-24 10:14:11,856 INFO L180 QuantifierPusher]: treesize reduction 12, result has 94.0 percent of original size [2021-10-24 10:14:11,861 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 183 [2021-10-24 10:14:11,881 INFO L180 QuantifierPusher]: treesize reduction 12, result has 94.1 percent of original size [2021-10-24 10:14:11,889 INFO L185 QuantifierPusher]: treesize reduction 12, result has 92.7 percent of original size 152 [2021-10-24 10:14:11,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,931 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,972 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:11,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,128 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,129 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,180 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,187 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,196 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:14:12,203 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-24 10:14:14,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-24 10:14:14,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-24 10:14:14,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2021-10-24 10:14:14,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892676712] [2021-10-24 10:14:14,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-24 10:14:14,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:14:14,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-24 10:14:14,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2021-10-24 10:14:14,199 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:14,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:14,351 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-24 10:14:14,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-24 10:14:14,352 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:14:14,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:14,353 INFO L225 Difference]: With dead ends: 40 [2021-10-24 10:14:14,353 INFO L226 Difference]: Without dead ends: 40 [2021-10-24 10:14:14,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2218.8ms TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2021-10-24 10:14:14,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-24 10:14:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-24 10:14:14,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:14,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-10-24 10:14:14,357 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 12 [2021-10-24 10:14:14,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:14,357 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-10-24 10:14:14,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:14,358 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-10-24 10:14:14,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:14:14,358 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:14,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:14,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-24 10:14:14,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:14:14,568 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash -700083557, now seen corresponding path program 1 times [2021-10-24 10:14:14,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:14:14,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003842202] [2021-10-24 10:14:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:14,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:14:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:14:14,587 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:14:14,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:14:14,619 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:14:14,619 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:14:14,620 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 10:14:14,622 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 10:14:14,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 10:14:14,623 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 10:14:14,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 10:14:14,625 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 10:14:14,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 10:14:14,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-24 10:14:14,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 10:14:14,626 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 10:14:14,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 10:14:14,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 10:14:14,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-24 10:14:14,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 10:14:14,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-24 10:14:14,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-24 10:14:14,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-10-24 10:14:14,635 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:14:14,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:14:14 BoogieIcfgContainer [2021-10-24 10:14:14,665 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:14:14,666 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:14:14,666 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:14:14,666 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:14:14,667 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:08" (3/4) ... [2021-10-24 10:14:14,670 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:14:14,670 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:14:14,676 INFO L168 Benchmark]: Toolchain (without parser) took 7961.48 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 56.7 MB in the beginning and 54.9 MB in the end (delta: 1.7 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,679 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:14:14,679 INFO L168 Benchmark]: CACSL2BoogieTranslator took 577.00 ms. Allocated memory is still 100.7 MB. Free memory was 56.5 MB in the beginning and 69.7 MB in the end (delta: -13.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,681 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.36 ms. Allocated memory is still 100.7 MB. Free memory was 69.7 MB in the beginning and 67.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,682 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 ms. Allocated memory is still 100.7 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,682 INFO L168 Benchmark]: RCFGBuilder took 673.19 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 51.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,683 INFO L168 Benchmark]: TraceAbstraction took 6571.69 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 50.9 MB in the beginning and 54.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:14,684 INFO L168 Benchmark]: Witness Printer took 4.51 ms. Allocated memory is still 123.7 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:14:14,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 100.7 MB. Free memory was 74.6 MB in the beginning and 74.6 MB in the end (delta: 60.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 577.00 ms. Allocated memory is still 100.7 MB. Free memory was 56.5 MB in the beginning and 69.7 MB in the end (delta: -13.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.36 ms. Allocated memory is still 100.7 MB. Free memory was 69.7 MB in the beginning and 67.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.38 ms. Allocated memory is still 100.7 MB. Free memory was 67.7 MB in the beginning and 66.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 673.19 ms. Allocated memory is still 100.7 MB. Free memory was 66.3 MB in the beginning and 51.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6571.69 ms. Allocated memory was 100.7 MB in the beginning and 123.7 MB in the end (delta: 23.1 MB). Free memory was 50.9 MB in the beginning and 54.9 MB in the end (delta: -4.0 MB). Peak memory consumption was 21.1 MB. Max. memory is 16.1 GB. * Witness Printer took 4.51 ms. Allocated memory is still 123.7 MB. Free memory is still 54.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 35 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 6459.9ms, OverallIterations: 9, TraceHistogramMax: 2, EmptinessCheckTime: 21.1ms, AutomataDifference: 923.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 17.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 163 SDtfs, 342 SDslu, 159 SDs, 0 SdLazy, 391 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 461.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2449.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.8ms AutomataMinimizationTime, 8 MinimizatonAttempts, 48 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 45.3ms SsaConstructionTime, 210.1ms SatisfiabilityAnalysisTime, 1516.5ms InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 80 ConstructedInterpolants, 0 QuantifiedInterpolants, 701 SizeOfPredicates, 6 NumberOfNonLiveVariables, 78 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 10:14:14,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:14:17,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:14:17,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:14:17,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:14:17,393 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:14:17,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:14:17,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:14:17,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:14:17,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:14:17,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:14:17,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:14:17,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:14:17,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:14:17,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:14:17,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:14:17,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:14:17,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:14:17,438 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:14:17,440 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:14:17,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:14:17,450 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:14:17,452 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:14:17,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:14:17,457 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:14:17,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:14:17,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:14:17,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:14:17,466 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:14:17,466 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:14:17,468 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:14:17,469 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:14:17,470 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:14:17,472 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:14:17,473 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:14:17,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:14:17,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:14:17,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:14:17,477 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:14:17,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:14:17,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:14:17,480 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:14:17,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-24 10:14:17,544 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:14:17,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:14:17,546 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:14:17,546 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:14:17,546 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:14:17,547 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:14:17,547 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:14:17,547 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:14:17,548 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:14:17,550 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-24 10:14:17,551 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-24 10:14:17,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:14:17,552 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:14:17,552 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:14:17,552 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:14:17,552 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:14:17,553 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:14:17,553 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-24 10:14:17,553 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-24 10:14:17,553 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-24 10:14:17,554 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:14:17,554 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:14:17,554 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-24 10:14:17,554 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-24 10:14:17,555 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:14:17,555 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:14:17,555 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:14:17,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-24 10:14:17,556 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:14:17,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:14:17,556 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:14:17,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:14:17,557 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-24 10:14:17,558 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-24 10:14:17,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:14:17,558 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:14:17,558 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-10-24 10:14:17,962 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:14:17,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:14:18,000 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:14:18,003 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:14:18,004 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:14:18,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/list-properties/simple-2.i [2021-10-24 10:14:18,076 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/16c4c3868/0eda8876512445e0905a0a06af7bac55/FLAG598cc0fc6 [2021-10-24 10:14:18,671 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:14:18,671 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i [2021-10-24 10:14:18,696 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/16c4c3868/0eda8876512445e0905a0a06af7bac55/FLAG598cc0fc6 [2021-10-24 10:14:18,999 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/data/16c4c3868/0eda8876512445e0905a0a06af7bac55 [2021-10-24 10:14:19,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:14:19,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:14:19,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:14:19,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:14:19,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:14:19,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8137b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19, skipping insertion in model container [2021-10-24 10:14:19,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:14:19,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:14:19,454 WARN L228 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-24 10:14:19,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:14:19,483 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:14:19,555 WARN L228 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_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/sv-benchmarks/c/list-properties/simple-2.i[23225,23238] [2021-10-24 10:14:19,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:14:19,639 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:14:19,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19 WrapperNode [2021-10-24 10:14:19,640 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:14:19,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:14:19,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:14:19,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:14:19,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,692 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,730 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:14:19,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:14:19,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:14:19,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:14:19,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,775 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:14:19,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:14:19,789 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:14:19,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:14:19,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (1/1) ... [2021-10-24 10:14:19,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:14:19,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:14:19,828 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:14:19,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:14:19,889 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-24 10:14:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-24 10:14:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-24 10:14:19,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:14:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-24 10:14:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-24 10:14:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-24 10:14:19,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:14:19,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:14:20,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:14:20,435 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-24 10:14:20,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:20 BoogieIcfgContainer [2021-10-24 10:14:20,437 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:14:20,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:14:20,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:14:20,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:14:20,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:14:19" (1/3) ... [2021-10-24 10:14:20,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbe6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:14:20, skipping insertion in model container [2021-10-24 10:14:20,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:14:19" (2/3) ... [2021-10-24 10:14:20,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bbe6a2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:14:20, skipping insertion in model container [2021-10-24 10:14:20,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:20" (3/3) ... [2021-10-24 10:14:20,457 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-10-24 10:14:20,464 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:14:20,464 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-10-24 10:14:20,524 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:14:20,532 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:14:20,532 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-10-24 10:14:20,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 25 states have (on average 1.92) internal successors, (48), 41 states have internal predecessors, (48), 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) [2021-10-24 10:14:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:14:20,559 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:20,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:14:20,561 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:20,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:20,568 INFO L82 PathProgramCache]: Analyzing trace with hash 889599230, now seen corresponding path program 1 times [2021-10-24 10:14:20,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:20,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1337980426] [2021-10-24 10:14:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:20,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:20,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-24 10:14:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:20,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:14:20,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:20,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 10:14:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:20,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:20,967 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:20,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1337980426] [2021-10-24 10:14:20,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1337980426] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:20,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:20,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-24 10:14:20,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987629490] [2021-10-24 10:14:20,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:14:20,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:21,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:14:21,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:14:21,023 INFO L87 Difference]: Start difference. First operand has 42 states, 25 states have (on average 1.92) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:21,304 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-10-24 10:14:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:14:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-24 10:14:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:21,318 INFO L225 Difference]: With dead ends: 51 [2021-10-24 10:14:21,318 INFO L226 Difference]: Without dead ends: 45 [2021-10-24 10:14:21,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-24 10:14:21,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-10-24 10:14:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 38 states have internal predecessors, (45), 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) [2021-10-24 10:14:21,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-24 10:14:21,368 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 6 [2021-10-24 10:14:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:21,369 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-24 10:14:21,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:21,369 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-24 10:14:21,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-24 10:14:21,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:21,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-24 10:14:21,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-24 10:14:21,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:21,585 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:21,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:21,590 INFO L82 PathProgramCache]: Analyzing trace with hash 889599231, now seen corresponding path program 1 times [2021-10-24 10:14:21,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:21,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747456630] [2021-10-24 10:14:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:21,595 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:21,596 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:21,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-24 10:14:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:21,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:14:21,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:21,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 10:14:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:21,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:22,062 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:22,063 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747456630] [2021-10-24 10:14:22,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747456630] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:22,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:22,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-24 10:14:22,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816114767] [2021-10-24 10:14:22,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:14:22,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:22,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:14:22,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:14:22,067 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-10-24 10:14:22,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:22,481 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2021-10-24 10:14:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-24 10:14:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 6 [2021-10-24 10:14:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:22,483 INFO L225 Difference]: With dead ends: 54 [2021-10-24 10:14:22,484 INFO L226 Difference]: Without dead ends: 54 [2021-10-24 10:14:22,485 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:14:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-24 10:14:22,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2021-10-24 10:14:22,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-10-24 10:14:22,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-10-24 10:14:22,499 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2021-10-24 10:14:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:22,500 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-10-24 10:14:22,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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) [2021-10-24 10:14:22,504 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-10-24 10:14:22,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-24 10:14:22,506 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:22,507 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:22,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:22,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:22,708 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:22,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1828101368, now seen corresponding path program 1 times [2021-10-24 10:14:22,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:22,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658095626] [2021-10-24 10:14:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:22,710 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:22,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:22,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:22,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-24 10:14:22,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:14:22,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:22,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:22,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:22,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658095626] [2021-10-24 10:14:22,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658095626] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:22,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:22,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-24 10:14:22,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130442617] [2021-10-24 10:14:22,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:14:22,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:22,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:14:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-24 10:14:22,934 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-24 10:14:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:23,179 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-10-24 10:14:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-24 10:14:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 [2021-10-24 10:14:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:23,181 INFO L225 Difference]: With dead ends: 51 [2021-10-24 10:14:23,182 INFO L226 Difference]: Without dead ends: 51 [2021-10-24 10:14:23,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:14:23,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-24 10:14:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-10-24 10:14:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 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) [2021-10-24 10:14:23,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-10-24 10:14:23,197 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2021-10-24 10:14:23,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:23,197 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-10-24 10:14:23,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-10-24 10:14:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-10-24 10:14:23,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-24 10:14:23,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:23,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:23,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:23,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:23,400 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:23,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash 836608451, now seen corresponding path program 1 times [2021-10-24 10:14:23,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:23,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1974165974] [2021-10-24 10:14:23,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:23,402 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:23,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:23,404 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:23,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-24 10:14:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:23,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-24 10:14:23,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:23,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-24 10:14:23,636 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-24 10:14:23,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-24 10:14:23,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-24 10:14:23,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:23,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:23,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-24 10:14:23,754 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-24 10:14:23,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 69 [2021-10-24 10:14:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:23,892 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:23,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1974165974] [2021-10-24 10:14:23,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1974165974] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:23,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:23,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2021-10-24 10:14:23,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235010806] [2021-10-24 10:14:23,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-24 10:14:23,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:23,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-24 10:14:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-24 10:14:23,896 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:24,382 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-10-24 10:14:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-24 10:14:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-24 10:14:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:24,386 INFO L225 Difference]: With dead ends: 82 [2021-10-24 10:14:24,386 INFO L226 Difference]: Without dead ends: 82 [2021-10-24 10:14:24,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:14:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-24 10:14:24,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2021-10-24 10:14:24,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:24,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-10-24 10:14:24,393 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2021-10-24 10:14:24,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:24,393 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-10-24 10:14:24,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:24,394 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-10-24 10:14:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:14:24,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:24,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:24,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:24,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:24,596 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:24,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:24,597 INFO L82 PathProgramCache]: Analyzing trace with hash 903973711, now seen corresponding path program 1 times [2021-10-24 10:14:24,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:24,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374738990] [2021-10-24 10:14:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:24,598 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:24,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:24,599 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:24,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-24 10:14:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:24,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:14:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:24,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 10:14:24,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-10-24 10:14:24,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-24 10:14:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:24,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:24,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:24,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374738990] [2021-10-24 10:14:24,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374738990] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:24,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:24,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-24 10:14:24,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256607198] [2021-10-24 10:14:24,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-24 10:14:24,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-24 10:14:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:14:24,880 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:25,268 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2021-10-24 10:14:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-24 10:14:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-24 10:14:25,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:25,270 INFO L225 Difference]: With dead ends: 62 [2021-10-24 10:14:25,270 INFO L226 Difference]: Without dead ends: 62 [2021-10-24 10:14:25,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-10-24 10:14:25,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-24 10:14:25,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2021-10-24 10:14:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 47 states have internal predecessors, (51), 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) [2021-10-24 10:14:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-10-24 10:14:25,285 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 13 [2021-10-24 10:14:25,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:25,286 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-10-24 10:14:25,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:25,286 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-10-24 10:14:25,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:14:25,287 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:25,287 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:25,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:25,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:25,496 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:25,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:25,497 INFO L82 PathProgramCache]: Analyzing trace with hash 903973712, now seen corresponding path program 1 times [2021-10-24 10:14:25,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:25,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419011860] [2021-10-24 10:14:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:25,498 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:25,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:25,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:25,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-24 10:14:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:25,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-24 10:14:25,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:25,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-24 10:14:25,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:25,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-10-24 10:14:25,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-10-24 10:14:25,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-10-24 10:14:25,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:25,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:26,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:26,137 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:26,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419011860] [2021-10-24 10:14:26,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419011860] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:14:26,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:14:26,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-10-24 10:14:26,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499037637] [2021-10-24 10:14:26,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-24 10:14:26,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:26,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-24 10:14:26,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-10-24 10:14:26,139 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:27,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:27,048 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-24 10:14:27,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-24 10:14:27,049 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-24 10:14:27,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:27,050 INFO L225 Difference]: With dead ends: 58 [2021-10-24 10:14:27,050 INFO L226 Difference]: Without dead ends: 58 [2021-10-24 10:14:27,051 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 471.4ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:14:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-24 10:14:27,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 38. [2021-10-24 10:14:27,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:27,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-10-24 10:14:27,056 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2021-10-24 10:14:27,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:27,057 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-10-24 10:14:27,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:14:27,057 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-10-24 10:14:27,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 10:14:27,058 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:27,058 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:27,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:27,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:27,264 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:27,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:27,265 INFO L82 PathProgramCache]: Analyzing trace with hash -288017401, now seen corresponding path program 1 times [2021-10-24 10:14:27,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:27,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [647146096] [2021-10-24 10:14:27,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:27,266 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:27,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:27,270 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:27,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-24 10:14:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:27,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-24 10:14:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:27,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:27,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:27,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 25 [2021-10-24 10:14:27,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-10-24 10:14:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:27,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-24 10:14:27,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:27,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:27,720 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-24 10:14:27,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [647146096] [2021-10-24 10:14:27,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [647146096] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:14:27,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [459746831] [2021-10-24 10:14:27,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:27,722 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-24 10:14:27,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/cvc4 [2021-10-24 10:14:27,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-24 10:14:27,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-24 10:14:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:14:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:28,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:28,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:28,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-24 10:14:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-24 10:14:28,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:28,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:28,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-24 10:14:28,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:28,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:28,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [459746831] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:14:28,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680857905] [2021-10-24 10:14:28,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:28,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:14:28,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:14:28,331 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:14:28,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-24 10:14:28,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:14:28,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-24 10:14:28,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:14:28,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:28,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-24 10:14:28,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-10-24 10:14:28,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-10-24 10:14:28,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:28,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:14:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-10-24 10:14:28,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:28,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-24 10:14:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:14:28,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680857905] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-24 10:14:28,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-24 10:14:28,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8, 7] total 11 [2021-10-24 10:14:28,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211868490] [2021-10-24 10:14:28,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-24 10:14:28,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-24 10:14:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-24 10:14:28,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-10-24 10:14:28,771 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-10-24 10:14:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:14:29,138 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-10-24 10:14:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-24 10:14:29,138 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-24 10:14:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:14:29,139 INFO L225 Difference]: With dead ends: 53 [2021-10-24 10:14:29,139 INFO L226 Difference]: Without dead ends: 53 [2021-10-24 10:14:29,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-10-24 10:14:29,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-24 10:14:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-10-24 10:14:29,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 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) [2021-10-24 10:14:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-10-24 10:14:29,144 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-10-24 10:14:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:14:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-10-24 10:14:29,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 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) [2021-10-24 10:14:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-10-24 10:14:29,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-24 10:14:29,145 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:14:29,145 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:14:29,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:29,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2021-10-24 10:14:29,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-24 10:14:29,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:14:29,746 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-10-24 10:14:29,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:14:29,747 INFO L82 PathProgramCache]: Analyzing trace with hash -338606125, now seen corresponding path program 1 times [2021-10-24 10:14:29,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-24 10:14:29,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203931042] [2021-10-24 10:14:29,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:14:29,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-24 10:14:29,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat [2021-10-24 10:14:29,751 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-24 10:14:29,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-24 10:14:29,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:14:29,901 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:14:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:14:29,982 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-24 10:14:29,982 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:14:29,984 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 10:14:29,986 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-24 10:14:29,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-24 10:14:29,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-24 10:14:29,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-24 10:14:29,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-24 10:14:29,987 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-24 10:14:29,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-24 10:14:29,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-24 10:14:29,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-24 10:14:29,988 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-24 10:14:29,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-24 10:14:29,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-24 10:14:29,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK [2021-10-24 10:14:29,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-24 10:14:29,989 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-24 10:14:30,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-10-24 10:14:30,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/mathsat -unsat_core_generation=3 [2021-10-24 10:14:30,197 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:14:30,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:14:30 BoogieIcfgContainer [2021-10-24 10:14:30,234 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:14:30,235 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:14:30,235 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:14:30,236 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:14:30,236 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:14:20" (3/4) ... [2021-10-24 10:14:30,241 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-24 10:14:30,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:14:30,243 INFO L168 Benchmark]: Toolchain (without parser) took 11238.84 ms. Allocated memory was 50.3 MB in the beginning and 79.7 MB in the end (delta: 29.4 MB). Free memory was 26.0 MB in the beginning and 40.3 MB in the end (delta: -14.3 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,244 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory was 32.0 MB in the beginning and 31.9 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:14:30,245 INFO L168 Benchmark]: CACSL2BoogieTranslator took 635.59 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 25.8 MB in the beginning and 42.8 MB in the end (delta: -17.0 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,245 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.81 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 40.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,246 INFO L168 Benchmark]: Boogie Preprocessor took 55.66 ms. Allocated memory is still 62.9 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:14:30,246 INFO L168 Benchmark]: RCFGBuilder took 648.76 ms. Allocated memory is still 62.9 MB. Free memory was 39.2 MB in the beginning and 43.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,247 INFO L168 Benchmark]: TraceAbstraction took 9795.35 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 43.6 MB in the beginning and 41.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,248 INFO L168 Benchmark]: Witness Printer took 6.99 ms. Allocated memory is still 79.7 MB. Free memory was 41.0 MB in the beginning and 40.3 MB in the end (delta: 750.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:14:30,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 50.3 MB. Free memory was 32.0 MB in the beginning and 31.9 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 635.59 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 25.8 MB in the beginning and 42.8 MB in the end (delta: -17.0 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.81 ms. Allocated memory is still 62.9 MB. Free memory was 42.8 MB in the beginning and 40.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.66 ms. Allocated memory is still 62.9 MB. Free memory was 40.8 MB in the beginning and 39.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 648.76 ms. Allocated memory is still 62.9 MB. Free memory was 39.2 MB in the beginning and 43.9 MB in the end (delta: -4.7 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9795.35 ms. Allocated memory was 62.9 MB in the beginning and 79.7 MB in the end (delta: 16.8 MB). Free memory was 43.6 MB in the beginning and 41.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * Witness Printer took 6.99 ms. Allocated memory is still 79.7 MB. Free memory was 41.0 MB in the beginning and 40.3 MB in the end (delta: 750.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 9673.2ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 19.5ms, AutomataDifference: 3170.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 158 SDtfs, 464 SDslu, 344 SDs, 0 SdLazy, 652 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2112.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 216 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1246.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=4, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.0ms AutomataMinimizationTime, 7 MinimizatonAttempts, 97 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 89.0ms SsaConstructionTime, 285.1ms SatisfiabilityAnalysisTime, 2985.5ms InterpolantComputationTime, 122 NumberOfCodeBlocks, 122 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 194 ConstructedInterpolants, 1 QuantifiedInterpolants, 1486 SizeOfPredicates, 52 NumberOfNonLiveVariables, 468 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 10/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-24 10:14:30,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d93c2c1-e44b-4743-93b4-3a9cda5fae54/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...