./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:05:13,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:05:13,227 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:05:13,299 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:05:13,299 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:05:13,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:05:13,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:05:13,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:05:13,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:05:13,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:05:13,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:05:13,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:05:13,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:05:13,331 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:05:13,334 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:05:13,340 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:05:13,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:05:13,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:05:13,348 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:05:13,351 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:05:13,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:05:13,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:05:13,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:05:13,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:05:13,377 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:05:13,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:05:13,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:05:13,380 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:05:13,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:05:13,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:05:13,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:05:13,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:05:13,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:05:13,389 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:05:13,391 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:05:13,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:05:13,392 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:05:13,392 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:05:13,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:05:13,394 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:05:13,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:05:13,396 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:05:13,450 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:05:13,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:05:13,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:05:13,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:05:13,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:05:13,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:05:13,462 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:05:13,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:05:13,463 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:05:13,463 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:05:13,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:05:13,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:05:13,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:05:13,466 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:05:13,466 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:05:13,466 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:05:13,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:05:13,467 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:05:13,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:05:13,467 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:05:13,468 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:05:13,468 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:05:13,468 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:05:13,469 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:13,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:05:13,469 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:05:13,470 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:05:13,470 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:05:13,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:05:13,472 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 [2021-11-02 22:05:13,769 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:05:13,810 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:05:13,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:05:13,815 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:05:13,816 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:05:13,818 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/list-1.i [2021-11-02 22:05:13,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/7e5425804/a8a0c6fdb2cc4141a8f7bcb9cbd344e9/FLAG45e5e7819 [2021-11-02 22:05:14,484 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:05:14,485 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i [2021-11-02 22:05:14,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/7e5425804/a8a0c6fdb2cc4141a8f7bcb9cbd344e9/FLAG45e5e7819 [2021-11-02 22:05:14,790 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/7e5425804/a8a0c6fdb2cc4141a8f7bcb9cbd344e9 [2021-11-02 22:05:14,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:05:14,795 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:05:14,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:14,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:05:14,809 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:05:14,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:14" (1/1) ... [2021-11-02 22:05:14,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ae41274 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:14, skipping insertion in model container [2021-11-02 22:05:14,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:14" (1/1) ... [2021-11-02 22:05:14,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:05:14,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:05:15,211 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_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-11-02 22:05:15,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:15,225 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:05:15,267 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_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-11-02 22:05:15,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:15,299 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:05:15,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15 WrapperNode [2021-11-02 22:05:15,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:15,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:05:15,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:05:15,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:05:15,313 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,328 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,354 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:05:15,362 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:05:15,362 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:05:15,362 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:05:15,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (1/1) ... [2021-11-02 22:05:15,371 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:15,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:15,403 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:05:15,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:05:15,464 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:05:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:05:15,465 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:05:15,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:05:15,466 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:05:15,467 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:05:15,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:05:15,468 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:05:15,468 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:05:15,469 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:05:15,469 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:05:15,470 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:05:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:05:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:05:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:05:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:05:15,471 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:05:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:05:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:05:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:05:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:05:15,472 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:05:15,473 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:05:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:05:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:05:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:05:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:05:15,474 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:05:15,475 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:05:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:05:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:05:15,476 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:05:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:05:15,477 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:05:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:05:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:05:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:05:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:05:15,478 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:05:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:05:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:05:15,479 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:05:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:05:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:05:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:05:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:05:15,480 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:05:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:05:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:05:15,481 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:05:15,482 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:05:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:05:15,483 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:05:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:05:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:05:15,484 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:05:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:05:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:05:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:05:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:05:15,485 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:05:15,486 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:05:15,487 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:05:15,487 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:05:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:05:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:05:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:05:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:05:15,488 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:05:15,489 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:05:15,490 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:05:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:05:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:05:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:05:15,491 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:05:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:05:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:05:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:05:15,492 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:05:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:05:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:05:15,493 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:05:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:05:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:05:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:05:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:05:15,494 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:05:15,495 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:05:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:05:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:05:15,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:05:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:05:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:05:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:05:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:05:15,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:05:15,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:05:15,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:05:15,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:05:15,851 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:05:16,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:05:16,211 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:05:16,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:16 BoogieIcfgContainer [2021-11-02 22:05:16,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:05:16,216 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:05:16,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:05:16,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:05:16,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:05:14" (1/3) ... [2021-11-02 22:05:16,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702a0636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:16, skipping insertion in model container [2021-11-02 22:05:16,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:15" (2/3) ... [2021-11-02 22:05:16,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702a0636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:16, skipping insertion in model container [2021-11-02 22:05:16,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:16" (3/3) ... [2021-11-02 22:05:16,230 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-11-02 22:05:16,242 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:05:16,243 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-11-02 22:05:16,294 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:05:16,302 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:05:16,302 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-11-02 22:05:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:05:16,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:05:16,331 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:16,332 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:16,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:16,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 85898829, now seen corresponding path program 1 times [2021-11-02 22:05:16,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:16,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660689762] [2021-11-02 22:05:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:16,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:16,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:16,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:16,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:16,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:16,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660689762] [2021-11-02 22:05:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660689762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:16,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:16,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:05:16,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819426512] [2021-11-02 22:05:16,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:05:16,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:05:16,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:05:16,862 INFO L87 Difference]: Start difference. First operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:17,267 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-11-02 22:05:17,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:05:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-02 22:05:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:17,279 INFO L225 Difference]: With dead ends: 80 [2021-11-02 22:05:17,280 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 22:05:17,282 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:17,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 22:05:17,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-11-02 22:05:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-11-02 22:05:17,327 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 11 [2021-11-02 22:05:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-11-02 22:05:17,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-11-02 22:05:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 22:05:17,330 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:17,330 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:17,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:05:17,330 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:17,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:17,332 INFO L85 PathProgramCache]: Analyzing trace with hash 85898830, now seen corresponding path program 1 times [2021-11-02 22:05:17,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:17,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278242475] [2021-11-02 22:05:17,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:17,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:17,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:17,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:17,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:17,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:17,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:17,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278242475] [2021-11-02 22:05:17,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278242475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:17,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:17,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:05:17,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326043113] [2021-11-02 22:05:17,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:05:17,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:17,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:05:17,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:05:17,490 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:17,734 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-11-02 22:05:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:05:17,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-02 22:05:17,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:17,737 INFO L225 Difference]: With dead ends: 92 [2021-11-02 22:05:17,737 INFO L226 Difference]: Without dead ends: 92 [2021-11-02 22:05:17,738 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:17,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-02 22:05:17,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-11-02 22:05:17,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-11-02 22:05:17,748 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2021-11-02 22:05:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:17,748 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-11-02 22:05:17,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-11-02 22:05:17,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:05:17,750 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:17,750 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:17,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:05:17,751 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:17,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:17,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1250386406, now seen corresponding path program 1 times [2021-11-02 22:05:17,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:17,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648483016] [2021-11-02 22:05:17,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:17,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:17,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:17,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648483016] [2021-11-02 22:05:17,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648483016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:17,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:17,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:05:17,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574655204] [2021-11-02 22:05:17,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:17,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:17,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:17,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:17,897 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:18,166 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-11-02 22:05:18,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:05:18,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:05:18,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:18,172 INFO L225 Difference]: With dead ends: 120 [2021-11-02 22:05:18,172 INFO L226 Difference]: Without dead ends: 120 [2021-11-02 22:05:18,174 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-02 22:05:18,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-11-02 22:05:18,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-11-02 22:05:18,199 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 19 [2021-11-02 22:05:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:18,200 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-11-02 22:05:18,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-11-02 22:05:18,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:05:18,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:18,202 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:18,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:05:18,202 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:18,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash 13452608, now seen corresponding path program 1 times [2021-11-02 22:05:18,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:18,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863393804] [2021-11-02 22:05:18,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:18,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:18,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:18,327 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:18,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863393804] [2021-11-02 22:05:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863393804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:18,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:18,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:05:18,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850440071] [2021-11-02 22:05:18,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:18,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:18,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:18,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:18,330 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:18,646 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-11-02 22:05:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:05:18,647 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:05:18,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:18,649 INFO L225 Difference]: With dead ends: 109 [2021-11-02 22:05:18,649 INFO L226 Difference]: Without dead ends: 109 [2021-11-02 22:05:18,649 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:05:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-02 22:05:18,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-11-02 22:05:18,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-11-02 22:05:18,657 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-11-02 22:05:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-11-02 22:05:18,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:18,658 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-11-02 22:05:18,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:05:18,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:18,659 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:05:18,659 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:18,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:18,660 INFO L85 PathProgramCache]: Analyzing trace with hash 13452609, now seen corresponding path program 1 times [2021-11-02 22:05:18,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:18,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241199384] [2021-11-02 22:05:18,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:18,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:18,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:18,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:18,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241199384] [2021-11-02 22:05:18,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241199384] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:18,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:18,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:05:18,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793282428] [2021-11-02 22:05:18,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:18,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:18,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:18,805 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:19,190 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-11-02 22:05:19,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:05:19,191 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:05:19,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:19,192 INFO L225 Difference]: With dead ends: 110 [2021-11-02 22:05:19,192 INFO L226 Difference]: Without dead ends: 110 [2021-11-02 22:05:19,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:05:19,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-02 22:05:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-11-02 22:05:19,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-11-02 22:05:19,199 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2021-11-02 22:05:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:19,199 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-11-02 22:05:19,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-11-02 22:05:19,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:05:19,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:19,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:19,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:05:19,201 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:19,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:19,202 INFO L85 PathProgramCache]: Analyzing trace with hash 921876220, now seen corresponding path program 1 times [2021-11-02 22:05:19,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:19,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880516021] [2021-11-02 22:05:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:19,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:19,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:19,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880516021] [2021-11-02 22:05:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880516021] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:19,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:19,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:05:19,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137318902] [2021-11-02 22:05:19,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:19,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:19,294 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:19,479 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-11-02 22:05:19,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:05:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:05:19,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:19,481 INFO L225 Difference]: With dead ends: 122 [2021-11-02 22:05:19,481 INFO L226 Difference]: Without dead ends: 122 [2021-11-02 22:05:19,482 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-02 22:05:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-11-02 22:05:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-11-02 22:05:19,493 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2021-11-02 22:05:19,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:19,493 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-11-02 22:05:19,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,493 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-11-02 22:05:19,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:05:19,499 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:19,499 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:19,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:05:19,499 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 921928775, now seen corresponding path program 1 times [2021-11-02 22:05:19,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:19,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529278271] [2021-11-02 22:05:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:19,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:19,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:19,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:19,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529278271] [2021-11-02 22:05:19,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529278271] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:19,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:19,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-02 22:05:19,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444894854] [2021-11-02 22:05:19,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:19,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:19,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:19,643 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:19,859 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-11-02 22:05:19,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:05:19,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:05:19,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:19,860 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:05:19,861 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:05:19,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:05:19,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-11-02 22:05:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-11-02 22:05:19,869 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-11-02 22:05:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:19,869 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-11-02 22:05:19,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:19,870 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-11-02 22:05:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:05:19,871 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:19,871 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:19,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:05:19,871 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:19,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash 626114546, now seen corresponding path program 1 times [2021-11-02 22:05:19,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:19,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536858546] [2021-11-02 22:05:19,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:19,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:19,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:19,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:19,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536858546] [2021-11-02 22:05:19,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536858546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:19,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:19,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:05:19,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723083205] [2021-11-02 22:05:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:19,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:19,993 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:20,190 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-11-02 22:05:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:05:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:05:20,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:20,191 INFO L225 Difference]: With dead ends: 88 [2021-11-02 22:05:20,191 INFO L226 Difference]: Without dead ends: 88 [2021-11-02 22:05:20,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:05:20,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-02 22:05:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-11-02 22:05:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.34375) internal successors, (86), 76 states have internal predecessors, (86), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-11-02 22:05:20,195 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 21 [2021-11-02 22:05:20,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:20,196 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-11-02 22:05:20,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-11-02 22:05:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:05:20,197 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:20,197 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:20,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:05:20,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 626114547, now seen corresponding path program 1 times [2021-11-02 22:05:20,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:20,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912679060] [2021-11-02 22:05:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:20,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:20,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:05:20,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:20,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:20,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:05:20,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912679060] [2021-11-02 22:05:20,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912679060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:20,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:20,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:05:20,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324021136] [2021-11-02 22:05:20,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:05:20,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:05:20,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:05:20,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:05:20,337 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:20,593 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-11-02 22:05:20,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:05:20,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:05:20,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:20,595 INFO L225 Difference]: With dead ends: 85 [2021-11-02 22:05:20,595 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 22:05:20,595 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:05:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 22:05:20,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-11-02 22:05:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-11-02 22:05:20,598 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-11-02 22:05:20,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:20,599 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-11-02 22:05:20,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-11-02 22:05:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 22:05:20,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:20,600 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:20,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:05:20,600 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:20,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1486603147, now seen corresponding path program 1 times [2021-11-02 22:05:20,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:05:20,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214426971] [2021-11-02 22:05:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:20,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:05:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:05:20,613 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:05:20,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:05:20,655 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:05:20,655 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:05:20,657 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 22:05:20,660 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-02 22:05:20,660 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-02 22:05:20,660 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-02 22:05:20,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-02 22:05:20,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-02 22:05:20,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-02 22:05:20,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-02 22:05:20,661 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-02 22:05:20,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-02 22:05:20,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-11-02 22:05:20,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-11-02 22:05:20,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-02 22:05:20,662 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-11-02 22:05:20,665 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-11-02 22:05:20,665 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-11-02 22:05:20,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-02 22:05:20,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-02 22:05:20,669 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-11-02 22:05:20,670 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-11-02 22:05:20,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-11-02 22:05:20,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-11-02 22:05:20,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-11-02 22:05:20,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-11-02 22:05:20,682 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-11-02 22:05:20,683 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-11-02 22:05:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:05:20,686 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:20,690 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:05:20,708 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-02 22:05:20,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:05:20 BoogieIcfgContainer [2021-11-02 22:05:20,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:05:20,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:05:20,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:05:20,725 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:05:20,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:16" (3/4) ... [2021-11-02 22:05:20,729 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:05:20,730 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:05:20,731 INFO L168 Benchmark]: Toolchain (without parser) took 5935.56 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 71.1 MB in the beginning and 130.6 MB in the end (delta: -59.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:05:20,732 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:05:20,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 494.96 ms. Allocated memory is still 102.8 MB. Free memory was 71.1 MB in the beginning and 73.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:20,734 INFO L168 Benchmark]: Boogie Preprocessor took 60.55 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 70.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:20,734 INFO L168 Benchmark]: RCFGBuilder took 852.38 ms. Allocated memory is still 102.8 MB. Free memory was 70.9 MB in the beginning and 48.3 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:20,735 INFO L168 Benchmark]: TraceAbstraction took 4507.64 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 47.8 MB in the beginning and 130.6 MB in the end (delta: -82.8 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:20,735 INFO L168 Benchmark]: Witness Printer took 5.06 ms. Allocated memory is still 157.3 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:05:20,737 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 102.8 MB. Free memory is still 59.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 494.96 ms. Allocated memory is still 102.8 MB. Free memory was 71.1 MB in the beginning and 73.3 MB in the end (delta: -2.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.55 ms. Allocated memory is still 102.8 MB. Free memory was 73.3 MB in the beginning and 70.9 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 852.38 ms. Allocated memory is still 102.8 MB. Free memory was 70.9 MB in the beginning and 48.3 MB in the end (delta: 22.6 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4507.64 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 47.8 MB in the beginning and 130.6 MB in the end (delta: -82.8 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. * Witness Printer took 5.06 ms. Allocated memory is still 157.3 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={-1:0}, p={-1:0}] [L551] p = a VAL [a={-1:0}, p={-1:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={-1:0}, p={-1:0}] - 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: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: 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. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 92 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 4.3s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 395 SDtfs, 696 SDslu, 939 SDs, 0 SdLazy, 1788 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 194 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 802 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-02 22:05:20,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:05:23,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:05:23,244 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:05:23,286 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:05:23,287 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:05:23,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:05:23,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:05:23,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:05:23,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:05:23,297 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:05:23,299 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:05:23,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:05:23,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:05:23,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:05:23,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:05:23,307 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:05:23,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:05:23,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:05:23,313 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:05:23,316 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:05:23,318 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:05:23,320 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:05:23,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:05:23,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:05:23,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:05:23,329 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:05:23,330 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:05:23,331 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:05:23,332 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:05:23,333 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:05:23,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:05:23,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:05:23,337 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:05:23,338 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:05:23,339 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:05:23,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:05:23,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:05:23,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:05:23,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:05:23,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:05:23,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:05:23,362 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:05:23,391 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:05:23,392 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:05:23,392 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:05:23,392 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:05:23,394 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:05:23,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:05:23,395 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:05:23,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:05:23,396 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:05:23,396 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:05:23,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:05:23,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:05:23,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:05:23,397 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:05:23,398 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:05:23,398 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:05:23,398 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:05:23,399 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:05:23,399 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:05:23,400 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:05:23,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:05:23,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:05:23,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:05:23,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:05:23,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:05:23,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:23,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:05:23,403 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:05:23,403 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:05:23,403 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:05:23,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:05:23,404 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:05:23,404 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_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 657efb2af25c5cc2c0afb2bbf76276caecae7904494acc21657e1ac1176685b7 [2021-11-02 22:05:23,788 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:05:23,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:05:23,849 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:05:23,850 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:05:23,851 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:05:23,853 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/list-1.i [2021-11-02 22:05:23,949 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/8b97a827a/adeefe41f24e40ab90265b9533153ffe/FLAG09cbf7786 [2021-11-02 22:05:24,715 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:05:24,716 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i [2021-11-02 22:05:24,734 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/8b97a827a/adeefe41f24e40ab90265b9533153ffe/FLAG09cbf7786 [2021-11-02 22:05:24,948 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/data/8b97a827a/adeefe41f24e40ab90265b9533153ffe [2021-11-02 22:05:24,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:05:24,958 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:05:24,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:24,961 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:05:24,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:05:24,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:24" (1/1) ... [2021-11-02 22:05:24,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65ca285f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:24, skipping insertion in model container [2021-11-02 22:05:24,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:05:24" (1/1) ... [2021-11-02 22:05:24,977 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:05:25,044 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:05:25,427 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_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-11-02 22:05:25,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:25,468 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:05:25,531 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_c98fd6e3-26a9-4b64-ade8-432c14083612/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-11-02 22:05:25,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:05:25,570 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:05:25,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25 WrapperNode [2021-11-02 22:05:25,571 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:05:25,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:05:25,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:05:25,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:05:25,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,636 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,640 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:05:25,673 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:05:25,673 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:05:25,674 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:05:25,675 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (1/1) ... [2021-11-02 22:05:25,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:05:25,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:05:25,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:05:25,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:05:25,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:05:25,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:05:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:05:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:05:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:05:25,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:05:25,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:05:25,800 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:05:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:05:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:05:25,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:05:25,801 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:05:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:05:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:05:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:05:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:05:25,802 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:05:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:05:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:05:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:05:25,803 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:05:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:05:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:05:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:05:25,804 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:05:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:05:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:05:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:05:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:05:25,805 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:05:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:05:25,806 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:05:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:05:25,817 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:05:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:05:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:05:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:05:25,818 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:05:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:05:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:05:25,819 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:05:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:05:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:05:25,820 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:05:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:05:25,821 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:05:25,822 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:05:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:05:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:05:25,823 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:05:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:05:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:05:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:05:25,824 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:05:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:05:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:05:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:05:25,825 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:05:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:05:25,826 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:05:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:05:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:05:25,827 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:05:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:05:25,829 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:05:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:05:25,830 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:05:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:05:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:05:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:05:25,831 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:05:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:05:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:05:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:05:25,832 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:05:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:05:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:05:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:05:25,833 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:05:25,834 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:05:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:05:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:05:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:05:25,835 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:05:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:05:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:05:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:05:25,836 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:05:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:05:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:05:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:05:25,837 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:05:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:05:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:05:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:05:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:05:25,838 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:05:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:05:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:05:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:05:25,839 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:05:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:05:25,840 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:05:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:05:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:05:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:05:25,841 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:05:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:05:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:05:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:05:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:05:25,842 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:05:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:05:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:05:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:05:25,843 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:05:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:05:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:05:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:05:25,844 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:05:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:05:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:05:25,845 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:05:25,846 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:05:25,847 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:05:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:05:25,850 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:05:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:05:25,851 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:05:25,853 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:05:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:05:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:05:25,854 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:05:25,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:05:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:05:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:05:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:05:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:05:26,249 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:05:26,701 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:05:26,703 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-02 22:05:26,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:26 BoogieIcfgContainer [2021-11-02 22:05:26,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:05:26,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:05:26,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:05:26,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:05:26,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:05:24" (1/3) ... [2021-11-02 22:05:26,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddfffd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:26, skipping insertion in model container [2021-11-02 22:05:26,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:05:25" (2/3) ... [2021-11-02 22:05:26,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ddfffd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:05:26, skipping insertion in model container [2021-11-02 22:05:26,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:26" (3/3) ... [2021-11-02 22:05:26,717 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-11-02 22:05:26,725 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:05:26,726 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-11-02 22:05:26,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:05:26,805 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 22:05:26,805 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-11-02 22:05:26,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:05:26,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:05:26,850 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:26,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:26,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:26,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:26,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1692035718, now seen corresponding path program 1 times [2021-11-02 22:05:26,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:26,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [945014030] [2021-11-02 22:05:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:26,872 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:26,877 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:26,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:05:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:05:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:27,149 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 [2021-11-02 22:05:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:27,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:27,254 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:27,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [945014030] [2021-11-02 22:05:27,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [945014030] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:27,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:27,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:05:27,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360127877] [2021-11-02 22:05:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:05:27,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:27,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:05:27,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:05:27,296 INFO L87 Difference]: Start difference. First operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:27,701 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-11-02 22:05:27,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:05:27,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:05:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:27,712 INFO L225 Difference]: With dead ends: 76 [2021-11-02 22:05:27,712 INFO L226 Difference]: Without dead ends: 68 [2021-11-02 22:05:27,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:05:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-02 22:05:27,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-11-02 22:05:27,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:27,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-11-02 22:05:27,768 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 10 [2021-11-02 22:05:27,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:27,768 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-11-02 22:05:27,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-11-02 22:05:27,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:05:27,770 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:27,770 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:27,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:27,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:27,975 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:27,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:27,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1692035717, now seen corresponding path program 1 times [2021-11-02 22:05:27,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:27,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680044979] [2021-11-02 22:05:27,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:27,977 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:27,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:27,979 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:27,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:05:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:28,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:05:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:28,177 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 [2021-11-02 22:05:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:28,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:28,472 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:28,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680044979] [2021-11-02 22:05:28,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680044979] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:28,473 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:28,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:05:28,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804646939] [2021-11-02 22:05:28,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:05:28,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:28,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:05:28,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:28,477 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:29,100 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-11-02 22:05:29,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:05:29,102 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-02 22:05:29,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:29,103 INFO L225 Difference]: With dead ends: 87 [2021-11-02 22:05:29,104 INFO L226 Difference]: Without dead ends: 87 [2021-11-02 22:05:29,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:05:29,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-11-02 22:05:29,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-11-02 22:05:29,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:29,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-11-02 22:05:29,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 10 [2021-11-02 22:05:29,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:29,114 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-11-02 22:05:29,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:29,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-11-02 22:05:29,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:05:29,116 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:29,116 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:29,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-02 22:05:29,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:29,329 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:29,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:29,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1869130219, now seen corresponding path program 1 times [2021-11-02 22:05:29,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:29,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487127058] [2021-11-02 22:05:29,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:29,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:29,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:29,332 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:29,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:05:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:29,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:05:29,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:29,633 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 [2021-11-02 22:05:29,707 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 [2021-11-02 22:05:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:29,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:29,826 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 16 treesize of output 12 [2021-11-02 22:05:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:29,925 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:29,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487127058] [2021-11-02 22:05:29,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487127058] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:29,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:29,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-02 22:05:29,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348510827] [2021-11-02 22:05:29,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:05:29,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:29,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:05:29,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:29,928 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:30,665 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-11-02 22:05:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 22:05:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:05:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:30,679 INFO L225 Difference]: With dead ends: 153 [2021-11-02 22:05:30,679 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 22:05:30,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:05:30,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 22:05:30,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 81. [2021-11-02 22:05:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-11-02 22:05:30,695 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 17 [2021-11-02 22:05:30,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:30,696 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-11-02 22:05:30,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:30,696 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-11-02 22:05:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:05:30,698 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:30,698 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:30,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:30,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:30,922 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:30,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash 674842861, now seen corresponding path program 1 times [2021-11-02 22:05:30,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:30,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [732936756] [2021-11-02 22:05:30,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:30,925 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:30,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:30,926 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:30,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:05:31,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:05:31,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:31,168 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 [2021-11-02 22:05:31,218 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 23 treesize of output 19 [2021-11-02 22:05:31,254 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 25 treesize of output 13 [2021-11-02 22:05:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:31,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:31,390 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:31,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [732936756] [2021-11-02 22:05:31,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [732936756] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:31,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:31,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:05:31,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902057388] [2021-11-02 22:05:31,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:05:31,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:05:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:31,395 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:32,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:32,005 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-11-02 22:05:32,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:05:32,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:05:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:32,008 INFO L225 Difference]: With dead ends: 105 [2021-11-02 22:05:32,008 INFO L226 Difference]: Without dead ends: 105 [2021-11-02 22:05:32,008 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:32,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-02 22:05:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-11-02 22:05:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-11-02 22:05:32,031 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 17 [2021-11-02 22:05:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:32,031 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-11-02 22:05:32,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-11-02 22:05:32,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 22:05:32,036 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:32,036 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:32,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:32,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:32,250 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:32,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash 674842862, now seen corresponding path program 1 times [2021-11-02 22:05:32,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:32,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [643292680] [2021-11-02 22:05:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:32,251 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:32,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:32,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:32,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:05:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:32,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:05:32,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:32,464 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 [2021-11-02 22:05:32,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-02 22:05:32,533 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 [2021-11-02 22:05:32,594 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 [2021-11-02 22:05:32,617 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 [2021-11-02 22:05:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:32,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:33,031 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:33,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [643292680] [2021-11-02 22:05:33,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [643292680] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:33,032 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:33,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-02 22:05:33,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005785286] [2021-11-02 22:05:33,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:05:33,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:05:33,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:05:33,035 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:34,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:34,477 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-11-02 22:05:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:05:34,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-11-02 22:05:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:34,480 INFO L225 Difference]: With dead ends: 107 [2021-11-02 22:05:34,480 INFO L226 Difference]: Without dead ends: 107 [2021-11-02 22:05:34,481 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:05:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-02 22:05:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-11-02 22:05:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.403225806451613) internal successors, (87), 75 states have internal predecessors, (87), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:34,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-11-02 22:05:34,490 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 17 [2021-11-02 22:05:34,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:34,490 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-11-02 22:05:34,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:34,491 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-11-02 22:05:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:05:34,492 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:34,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:34,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:34,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:34,716 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1426802311, now seen corresponding path program 1 times [2021-11-02 22:05:34,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:34,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1193497025] [2021-11-02 22:05:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:34,717 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:34,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:34,717 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:05:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-02 22:05:34,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:34,954 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 [2021-11-02 22:05:34,998 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 [2021-11-02 22:05:35,007 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 [2021-11-02 22:05:35,061 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 [2021-11-02 22:05:35,069 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 [2021-11-02 22:05:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:35,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:35,460 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:35,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1193497025] [2021-11-02 22:05:35,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1193497025] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:35,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:35,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-02 22:05:35,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378921455] [2021-11-02 22:05:35,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:05:35,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:05:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:05:35,463 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:36,711 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2021-11-02 22:05:36,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 22:05:36,712 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:05:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:36,713 INFO L225 Difference]: With dead ends: 99 [2021-11-02 22:05:36,713 INFO L226 Difference]: Without dead ends: 99 [2021-11-02 22:05:36,713 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:05:36,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-11-02 22:05:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-11-02 22:05:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-11-02 22:05:36,722 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-11-02 22:05:36,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:36,722 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-11-02 22:05:36,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:36,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-11-02 22:05:36,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:05:36,724 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:36,724 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:36,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:36,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:36,942 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1426802312, now seen corresponding path program 1 times [2021-11-02 22:05:36,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:36,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [957578217] [2021-11-02 22:05:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:36,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:36,947 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:36,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:05:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:37,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:05:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:37,154 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 [2021-11-02 22:05:37,174 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 23 treesize of output 19 [2021-11-02 22:05:37,198 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 25 treesize of output 13 [2021-11-02 22:05:37,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:37,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:37,299 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:37,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [957578217] [2021-11-02 22:05:37,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [957578217] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:37,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:05:37,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363559861] [2021-11-02 22:05:37,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:05:37,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:05:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:37,302 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:37,732 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-11-02 22:05:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:05:37,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-11-02 22:05:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:37,734 INFO L225 Difference]: With dead ends: 91 [2021-11-02 22:05:37,734 INFO L226 Difference]: Without dead ends: 91 [2021-11-02 22:05:37,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-02 22:05:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-11-02 22:05:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-11-02 22:05:37,741 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 18 [2021-11-02 22:05:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:37,742 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-11-02 22:05:37,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-11-02 22:05:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:05:37,743 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:37,743 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:37,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:05:37,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:37,957 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -985440585, now seen corresponding path program 1 times [2021-11-02 22:05:37,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:37,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640073729] [2021-11-02 22:05:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:37,958 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:37,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:37,960 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:38,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:05:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:38,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:05:38,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:38,294 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 [2021-11-02 22:05:38,349 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 [2021-11-02 22:05:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:38,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:38,417 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 25 treesize of output 21 [2021-11-02 22:05:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:38,487 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:38,488 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640073729] [2021-11-02 22:05:38,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640073729] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:38,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:38,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-02 22:05:38,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948589296] [2021-11-02 22:05:38,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:05:38,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:38,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:05:38,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:05:38,490 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:38,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:38,880 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-11-02 22:05:38,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:05:38,881 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:05:38,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:38,882 INFO L225 Difference]: With dead ends: 107 [2021-11-02 22:05:38,882 INFO L226 Difference]: Without dead ends: 107 [2021-11-02 22:05:38,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:05:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-11-02 22:05:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2021-11-02 22:05:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 69 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-11-02 22:05:38,899 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 19 [2021-11-02 22:05:38,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:38,907 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-11-02 22:05:38,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-11-02 22:05:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:05:38,908 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:38,909 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:38,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:39,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:39,123 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:39,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:39,124 INFO L85 PathProgramCache]: Analyzing trace with hash -985388030, now seen corresponding path program 1 times [2021-11-02 22:05:39,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:39,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2118890809] [2021-11-02 22:05:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:39,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:39,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:39,127 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:39,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:05:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:05:39,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-02 22:05:39,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:05:39,457 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 [2021-11-02 22:05:39,519 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 [2021-11-02 22:05:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:39,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:05:39,623 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 16 treesize of output 12 [2021-11-02 22:05:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:05:39,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:05:39,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2118890809] [2021-11-02 22:05:39,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2118890809] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:05:39,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:05:39,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-11-02 22:05:39,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624052816] [2021-11-02 22:05:39,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:05:39,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:05:39,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:05:39,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:05:39,682 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:40,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:05:40,362 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-11-02 22:05:40,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:05:40,363 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-11-02 22:05:40,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:05:40,365 INFO L225 Difference]: With dead ends: 135 [2021-11-02 22:05:40,365 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:05:40,365 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:05:40,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:05:40,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2021-11-02 22:05:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.25) internal successors, (95), 83 states have internal predecessors, (95), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-11-02 22:05:40,377 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-11-02 22:05:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:05:40,378 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-11-02 22:05:40,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:05:40,379 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-11-02 22:05:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:05:40,380 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:05:40,380 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:40,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:40,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:40,594 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-11-02 22:05:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:05:40,595 INFO L85 PathProgramCache]: Analyzing trace with hash -483881938, now seen corresponding path program 1 times [2021-11-02 22:05:40,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:05:40,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [946381338] [2021-11-02 22:05:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:05:40,595 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:05:40,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:05:40,609 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:05:40,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-02 22:05:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:05:40,858 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:05:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:05:40,939 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-02 22:05:40,939 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:05:40,941 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 22:05:40,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-02 22:05:40,943 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-02 22:05:40,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-02 22:05:40,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-02 22:05:40,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-02 22:05:40,944 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-02 22:05:40,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-11-02 22:05:40,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-02 22:05:40,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-02 22:05:40,945 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-11-02 22:05:40,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-11-02 22:05:40,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-11-02 22:05:40,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-11-02 22:05:40,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-11-02 22:05:40,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-11-02 22:05:40,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-11-02 22:05:40,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-11-02 22:05:40,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-11-02 22:05:40,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-11-02 22:05:40,948 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-11-02 22:05:40,948 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-11-02 22:05:40,948 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-11-02 22:05:40,948 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-11-02 22:05:40,949 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-11-02 22:05:40,949 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-11-02 22:05:40,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:05:41,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:05:41,163 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:05:41,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:05:41,177 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-02 22:05:41,209 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:05:41 BoogieIcfgContainer [2021-11-02 22:05:41,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:05:41,212 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:05:41,212 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:05:41,212 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:05:41,213 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:05:26" (3/4) ... [2021-11-02 22:05:41,221 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:05:41,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:05:41,223 INFO L168 Benchmark]: Toolchain (without parser) took 16264.09 ms. Allocated memory was 58.7 MB in the beginning and 98.6 MB in the end (delta: 39.8 MB). Free memory was 36.0 MB in the beginning and 48.6 MB in the end (delta: -12.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:41,224 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 58.7 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:05:41,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.62 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 33.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:41,225 INFO L168 Benchmark]: Boogie Preprocessor took 99.70 ms. Allocated memory is still 58.7 MB. Free memory was 33.9 MB in the beginning and 31.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:41,226 INFO L168 Benchmark]: RCFGBuilder took 1033.46 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 30.8 MB in the beginning and 43.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:41,227 INFO L168 Benchmark]: TraceAbstraction took 14501.51 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 43.2 MB in the beginning and 48.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:05:41,227 INFO L168 Benchmark]: Witness Printer took 9.75 ms. Allocated memory is still 98.6 MB. Free memory is still 48.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:05:41,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 58.7 MB. Free memory is still 39.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 611.62 ms. Allocated memory is still 58.7 MB. Free memory was 35.8 MB in the beginning and 33.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 99.70 ms. Allocated memory is still 58.7 MB. Free memory was 33.9 MB in the beginning and 31.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1033.46 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 30.8 MB in the beginning and 43.8 MB in the end (delta: -13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14501.51 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 43.2 MB in the beginning and 48.6 MB in the end (delta: -5.4 MB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Witness Printer took 9.75 ms. Allocated memory is still 98.6 MB. Free memory is still 48.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, p={1:0}] [L551] p = a VAL [a={1:0}, p={1:0}] [L552] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={1:0}, p={1:0}] - 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: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: 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. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 96 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 14.3s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 383 SDtfs, 1033 SDslu, 1104 SDs, 0 SdLazy, 1407 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 275 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 47 NumberOfNonLiveVariables, 753 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 16/16 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 [2021-11-02 22:05:41,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c98fd6e3-26a9-4b64-ade8-432c14083612/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample