./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:44:11,420 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:44:11,422 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:44:11,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:44:11,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:44:11,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:44:11,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:44:11,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:44:11,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:44:11,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:44:11,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:44:11,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:44:11,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:44:11,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:44:11,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:44:11,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:44:11,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:44:11,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:44:11,460 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:44:11,462 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:44:11,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:44:11,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:44:11,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:44:11,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:44:11,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:44:11,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:44:11,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:44:11,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:44:11,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:44:11,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:44:11,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:44:11,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:44:11,480 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:44:11,481 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:44:11,482 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:44:11,482 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:44:11,483 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:44:11,483 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:44:11,483 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:44:11,484 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:44:11,485 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:44:11,486 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-07 01:44:11,514 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:44:11,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:44:11,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:44:11,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:44:11,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:44:11,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:44:11,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:44:11,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:44:11,517 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:44:11,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:44:11,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:44:11,517 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:44:11,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:44:11,517 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:44:11,518 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:44:11,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:44:11,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:44:11,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:44:11,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:44:11,519 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:44:11,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:44:11,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:44:11,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:44:11,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 01:44:11,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 01:44:11,521 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:44:11,521 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_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-12-07 01:44:11,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:44:11,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:44:11,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:44:11,723 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:44:11,723 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:44:11,725 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-07 01:44:11,769 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/c3a35ab12/b1634938106646d888f48a44ef5da1ed/FLAG904322b11 [2021-12-07 01:44:12,185 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:44:12,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-07 01:44:12,194 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/c3a35ab12/b1634938106646d888f48a44ef5da1ed/FLAG904322b11 [2021-12-07 01:44:12,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/c3a35ab12/b1634938106646d888f48a44ef5da1ed [2021-12-07 01:44:12,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:44:12,206 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:44:12,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:44:12,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:44:12,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:44:12,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b7cbc08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12, skipping insertion in model container [2021-12-07 01:44:12,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:44:12,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:44:12,433 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-12-07 01:44:12,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:44:12,444 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:44:12,484 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-12-07 01:44:12,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:44:12,514 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:44:12,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12 WrapperNode [2021-12-07 01:44:12,515 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:44:12,516 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:44:12,516 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:44:12,516 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:44:12,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,557 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2021-12-07 01:44:12,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:44:12,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:44:12,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:44:12,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:44:12,564 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,568 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,568 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,577 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:44:12,582 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:44:12,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:44:12,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:44:12,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (1/1) ... [2021-12-07 01:44:12,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:44:12,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:12,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:44:12,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:44:12,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-07 01:44:12,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-07 01:44:12,636 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 01:44:12,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:44:12,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:44:12,712 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:44:12,713 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:44:12,939 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:44:12,946 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:44:12,946 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 01:44:12,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:44:12 BoogieIcfgContainer [2021-12-07 01:44:12,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:44:12,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:44:12,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:44:12,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:44:12,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:44:12" (1/3) ... [2021-12-07 01:44:12,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc8d5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:44:12, skipping insertion in model container [2021-12-07 01:44:12,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:12" (2/3) ... [2021-12-07 01:44:12,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cc8d5f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:44:12, skipping insertion in model container [2021-12-07 01:44:12,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:44:12" (3/3) ... [2021-12-07 01:44:12,956 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-12-07 01:44:12,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:44:12,961 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-07 01:44:13,001 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:44:13,006 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 [2021-12-07 01:44:13,006 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-07 01:44:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:44:13,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,027 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843193, now seen corresponding path program 1 times [2021-12-07 01:44:13,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40670716] [2021-12-07 01:44:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:13,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:13,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40670716] [2021-12-07 01:44:13,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40670716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:13,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:13,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:44:13,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697298317] [2021-12-07 01:44:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:13,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:44:13,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:44:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:13,201 INFO L87 Difference]: Start difference. First operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:13,267 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-07 01:44:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:44:13,269 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:44:13,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:13,277 INFO L225 Difference]: With dead ends: 80 [2021-12-07 01:44:13,277 INFO L226 Difference]: Without dead ends: 77 [2021-12-07 01:44:13,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:13,281 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:13,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-07 01:44:13,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-07 01:44:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-07 01:44:13,315 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 7 [2021-12-07 01:44:13,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:13,315 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-07 01:44:13,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-07 01:44:13,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:44:13,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 01:44:13,316 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843194, now seen corresponding path program 1 times [2021-12-07 01:44:13,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867324189] [2021-12-07 01:44:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:13,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:13,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867324189] [2021-12-07 01:44:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867324189] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:13,363 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:44:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230929710] [2021-12-07 01:44:13,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:13,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:44:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:44:13,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:13,365 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:13,407 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-07 01:44:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:44:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:44:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:13,409 INFO L225 Difference]: With dead ends: 75 [2021-12-07 01:44:13,409 INFO L226 Difference]: Without dead ends: 75 [2021-12-07 01:44:13,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:13,410 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:13,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:13,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-07 01:44:13,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-07 01:44:13,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.711111111111111) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-07 01:44:13,417 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 7 [2021-12-07 01:44:13,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:13,418 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-07 01:44:13,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:13,418 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-07 01:44:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:44:13,418 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,419 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 01:44:13,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,419 INFO L85 PathProgramCache]: Analyzing trace with hash 649951808, now seen corresponding path program 1 times [2021-12-07 01:44:13,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953203842] [2021-12-07 01:44:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,420 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:44:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:13,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:13,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953203842] [2021-12-07 01:44:13,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953203842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:13,511 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:13,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:44:13,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002214690] [2021-12-07 01:44:13,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:13,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:44:13,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:13,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:44:13,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:44:13,512 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:13,641 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-07 01:44:13,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:44:13,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-07 01:44:13,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:13,644 INFO L225 Difference]: With dead ends: 79 [2021-12-07 01:44:13,644 INFO L226 Difference]: Without dead ends: 79 [2021-12-07 01:44:13,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:44:13,646 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:13,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:44:13,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-07 01:44:13,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-07 01:44:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-07 01:44:13,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 13 [2021-12-07 01:44:13,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:13,656 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-07 01:44:13,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,656 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-07 01:44:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:44:13,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 01:44:13,657 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 649951809, now seen corresponding path program 1 times [2021-12-07 01:44:13,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045066638] [2021-12-07 01:44:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:44:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:13,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:13,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045066638] [2021-12-07 01:44:13,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045066638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:13,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:13,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 01:44:13,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051213565] [2021-12-07 01:44:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:13,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 01:44:13,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 01:44:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:44:13,756 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:13,863 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-12-07 01:44:13,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 01:44:13,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-07 01:44:13,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:13,865 INFO L225 Difference]: With dead ends: 78 [2021-12-07 01:44:13,865 INFO L226 Difference]: Without dead ends: 78 [2021-12-07 01:44:13,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:44:13,866 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 9 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:13,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 309 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:44:13,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-07 01:44:13,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-12-07 01:44:13,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-12-07 01:44:13,872 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 13 [2021-12-07 01:44:13,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:13,872 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-12-07 01:44:13,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,872 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-12-07 01:44:13,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 01:44:13,873 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 01:44:13,873 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,874 INFO L85 PathProgramCache]: Analyzing trace with hash 87749440, now seen corresponding path program 1 times [2021-12-07 01:44:13,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510800400] [2021-12-07 01:44:13,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:13,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-07 01:44:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:13,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:13,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510800400] [2021-12-07 01:44:13,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510800400] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:13,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:13,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:44:13,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085383401] [2021-12-07 01:44:13,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:13,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:44:13,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:13,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:44:13,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:44:13,922 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:13,968 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-07 01:44:13,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:44:13,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-07 01:44:13,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:13,970 INFO L225 Difference]: With dead ends: 79 [2021-12-07 01:44:13,970 INFO L226 Difference]: Without dead ends: 79 [2021-12-07 01:44:13,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:44:13,972 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:13,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 186 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:13,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-07 01:44:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-07 01:44:13,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:13,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-07 01:44:13,979 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 15 [2021-12-07 01:44:13,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:13,980 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-07 01:44:13,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:13,980 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-07 01:44:13,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:44:13,981 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:13,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:13,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 01:44:13,981 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:13,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:13,982 INFO L85 PathProgramCache]: Analyzing trace with hash -847170750, now seen corresponding path program 1 times [2021-12-07 01:44:13,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824721742] [2021-12-07 01:44:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:13,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:44:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-07 01:44:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:44:14,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824721742] [2021-12-07 01:44:14,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824721742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:14,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643124787] [2021-12-07 01:44:14,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:14,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:44:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:14,049 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:44:14,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 01:44:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:44:14,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:14,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:44:14,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643124787] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:44:14,240 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:44:14,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-07 01:44:14,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346015083] [2021-12-07 01:44:14,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:14,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:44:14,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:14,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:44:14,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:14,242 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:44:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:14,292 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-07 01:44:14,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:44:14,293 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-07 01:44:14,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:14,294 INFO L225 Difference]: With dead ends: 80 [2021-12-07 01:44:14,294 INFO L226 Difference]: Without dead ends: 80 [2021-12-07 01:44:14,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:14,295 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:14,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 255 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-07 01:44:14,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-07 01:44:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-12-07 01:44:14,300 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 28 [2021-12-07 01:44:14,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:14,300 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-12-07 01:44:14,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:44:14,301 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-12-07 01:44:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:44:14,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:14,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:14,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:44:14,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-07 01:44:14,503 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:14,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281600, now seen corresponding path program 2 times [2021-12-07 01:44:14,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:14,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110118036] [2021-12-07 01:44:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:14,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:44:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 01:44:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:44:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:44:14,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110118036] [2021-12-07 01:44:14,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110118036] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:14,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077979225] [2021-12-07 01:44:14,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:44:14,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:44:14,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:14,826 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:44:14,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 01:44:14,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:44:14,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:44:14,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-07 01:44:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:14,950 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 [2021-12-07 01:44:14,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:15,037 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:44:15,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:15,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:15,225 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:44:15,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:44:15,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:15,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077979225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:15,404 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:44:15,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-12-07 01:44:15,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77755315] [2021-12-07 01:44:15,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:15,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 01:44:15,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:15,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 01:44:15,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:44:15,405 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:44:15,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:15,555 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-07 01:44:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-07 01:44:15,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2021-12-07 01:44:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:15,556 INFO L225 Difference]: With dead ends: 89 [2021-12-07 01:44:15,556 INFO L226 Difference]: Without dead ends: 89 [2021-12-07 01:44:15,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-12-07 01:44:15,557 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 86 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:15,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 250 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 163 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2021-12-07 01:44:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-07 01:44:15,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-12-07 01:44:15,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:15,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-12-07 01:44:15,563 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 41 [2021-12-07 01:44:15,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:15,564 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-12-07 01:44:15,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-07 01:44:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-12-07 01:44:15,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:44:15,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:15,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:15,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-07 01:44:15,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-07 01:44:15,767 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:15,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281601, now seen corresponding path program 1 times [2021-12-07 01:44:15,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 01:44:15,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384605938] [2021-12-07 01:44:15,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:15,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 01:44:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:15,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-07 01:44:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:15,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-07 01:44:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-07 01:44:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-07 01:44:16,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 01:44:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384605938] [2021-12-07 01:44:16,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384605938] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:16,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770541542] [2021-12-07 01:44:16,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:16,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:44:16,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:16,008 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:44:16,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 01:44:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:16,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:44:16,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:16,108 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 [2021-12-07 01:44:16,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:16,261 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 37605 column 46: unknown constant v_#length_BEFORE_CALL_2 [2021-12-07 01:44:16,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:44:16,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-07 01:44:16,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511031366] [2021-12-07 01:44:16,261 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:16,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 01:44:16,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 01:44:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 01:44:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:44:16,262 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:16,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:44:16,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 01:44:16,263 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:16,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:16,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 01:44:16,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:44:16,467 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1ec7ba1f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-07 01:44:16,474 INFO L158 Benchmark]: Toolchain (without parser) took 4266.87ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 91.5MB in the beginning and 107.3MB in the end (delta: -15.8MB). Peak memory consumption was 11.3MB. Max. memory is 16.1GB. [2021-12-07 01:44:16,475 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:44:16,476 INFO L158 Benchmark]: CACSL2BoogieTranslator took 308.22ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 74.3MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-07 01:44:16,477 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.36ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:44:16,478 INFO L158 Benchmark]: Boogie Preprocessor took 23.22ms. Allocated memory is still 115.3MB. Free memory was 72.2MB in the beginning and 70.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:44:16,479 INFO L158 Benchmark]: RCFGBuilder took 366.85ms. Allocated memory is still 115.3MB. Free memory was 70.7MB in the beginning and 53.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-07 01:44:16,480 INFO L158 Benchmark]: TraceAbstraction took 3522.61ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 53.4MB in the beginning and 107.3MB in the end (delta: -54.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:44:16,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 77.6MB. Free memory is still 48.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 308.22ms. Allocated memory is still 115.3MB. Free memory was 91.5MB in the beginning and 74.3MB in the end (delta: 17.2MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.36ms. Allocated memory is still 115.3MB. Free memory was 74.3MB in the beginning and 72.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.22ms. Allocated memory is still 115.3MB. Free memory was 72.2MB in the beginning and 70.7MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 366.85ms. Allocated memory is still 115.3MB. Free memory was 70.7MB in the beginning and 53.9MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 3522.61ms. Allocated memory was 115.3MB in the beginning and 138.4MB in the end (delta: 23.1MB). Free memory was 53.4MB in the beginning and 107.3MB in the end (delta: -54.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1ec7ba1f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1ec7ba1f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-07 01:44:16,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 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_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa --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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 01:44:18,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 01:44:18,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 01:44:18,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 01:44:18,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 01:44:18,198 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 01:44:18,200 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 01:44:18,202 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 01:44:18,205 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 01:44:18,206 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 01:44:18,207 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 01:44:18,208 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 01:44:18,209 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 01:44:18,210 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 01:44:18,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 01:44:18,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 01:44:18,214 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 01:44:18,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 01:44:18,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 01:44:18,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 01:44:18,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 01:44:18,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 01:44:18,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 01:44:18,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 01:44:18,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 01:44:18,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 01:44:18,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 01:44:18,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 01:44:18,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 01:44:18,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 01:44:18,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 01:44:18,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 01:44:18,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 01:44:18,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 01:44:18,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 01:44:18,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 01:44:18,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 01:44:18,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 01:44:18,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 01:44:18,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 01:44:18,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 01:44:18,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-07 01:44:18,264 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 01:44:18,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 01:44:18,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 01:44:18,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 01:44:18,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 01:44:18,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 01:44:18,266 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 01:44:18,266 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 01:44:18,266 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 01:44:18,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 01:44:18,267 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 01:44:18,267 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-07 01:44:18,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 01:44:18,267 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 01:44:18,267 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 01:44:18,268 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 01:44:18,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 01:44:18,269 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:44:18,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 01:44:18,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 01:44:18,270 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 01:44:18,270 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:18,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 01:44:18,270 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 01:44:18,270 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_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-12-07 01:44:18,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 01:44:18,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 01:44:18,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 01:44:18,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 01:44:18,515 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 01:44:18,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-07 01:44:18,558 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/b463c1d4e/9d10cb85c39248c88de099b5592d6489/FLAG10a87d7d4 [2021-12-07 01:44:18,984 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 01:44:18,985 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-07 01:44:18,994 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/b463c1d4e/9d10cb85c39248c88de099b5592d6489/FLAG10a87d7d4 [2021-12-07 01:44:19,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/data/b463c1d4e/9d10cb85c39248c88de099b5592d6489 [2021-12-07 01:44:19,005 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 01:44:19,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 01:44:19,008 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 01:44:19,008 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 01:44:19,011 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 01:44:19,011 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64a2695f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19, skipping insertion in model container [2021-12-07 01:44:19,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 01:44:19,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 01:44:19,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-12-07 01:44:19,262 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:44:19,275 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 01:44:19,317 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/sv-benchmarks/c/list-simple/sll2n_insert_equal.i[24301,24314] [2021-12-07 01:44:19,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 01:44:19,347 INFO L208 MainTranslator]: Completed translation [2021-12-07 01:44:19,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19 WrapperNode [2021-12-07 01:44:19,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 01:44:19,349 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 01:44:19,349 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 01:44:19,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 01:44:19,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,372 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,398 INFO L137 Inliner]: procedures = 130, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 123 [2021-12-07 01:44:19,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 01:44:19,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 01:44:19,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 01:44:19,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 01:44:19,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 01:44:19,433 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 01:44:19,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 01:44:19,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 01:44:19,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (1/1) ... [2021-12-07 01:44:19,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 01:44:19,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:19,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 01:44:19,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 01:44:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-07 01:44:19,490 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-07 01:44:19,494 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-07 01:44:19,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-07 01:44:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 01:44:19,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 01:44:19,495 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 01:44:19,573 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 01:44:19,574 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 01:44:19,900 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 01:44:19,905 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 01:44:19,905 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-07 01:44:19,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:44:19 BoogieIcfgContainer [2021-12-07 01:44:19,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 01:44:19,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 01:44:19,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 01:44:19,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 01:44:19,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 01:44:19" (1/3) ... [2021-12-07 01:44:19,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f12c4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:44:19, skipping insertion in model container [2021-12-07 01:44:19,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 01:44:19" (2/3) ... [2021-12-07 01:44:19,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f12c4b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 01:44:19, skipping insertion in model container [2021-12-07 01:44:19,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 01:44:19" (3/3) ... [2021-12-07 01:44:19,911 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-12-07 01:44:19,915 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 01:44:19,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-07 01:44:19,948 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 01:44:19,953 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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 [2021-12-07 01:44:19,957 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-07 01:44:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:44:19,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:19,975 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:19,975 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:19,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843193, now seen corresponding path program 1 times [2021-12-07 01:44:19,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:19,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954310355] [2021-12-07 01:44:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:19,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:19,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:19,990 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:19,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 01:44:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:20,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:44:20,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:20,129 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 [2021-12-07 01:44:20,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:20,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:44:20,144 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:20,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1954310355] [2021-12-07 01:44:20,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1954310355] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:20,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:20,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:44:20,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246341801] [2021-12-07 01:44:20,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:20,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:44:20,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:20,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:44:20,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:20,173 INFO L87 Difference]: Start difference. First operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:20,317 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-07 01:44:20,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:44:20,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:44:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:20,328 INFO L225 Difference]: With dead ends: 80 [2021-12-07 01:44:20,328 INFO L226 Difference]: Without dead ends: 77 [2021-12-07 01:44:20,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:20,332 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:20,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:44:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-07 01:44:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-07 01:44:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-07 01:44:20,362 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 7 [2021-12-07 01:44:20,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:20,362 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-07 01:44:20,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-07 01:44:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-07 01:44:20,363 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:20,363 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:20,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 01:44:20,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:20,565 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:20,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:20,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843194, now seen corresponding path program 1 times [2021-12-07 01:44:20,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:20,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761528995] [2021-12-07 01:44:20,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:20,569 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:20,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:20,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:20,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 01:44:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:20,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:44:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:20,735 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 [2021-12-07 01:44:20,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:20,750 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:44:20,750 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:20,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761528995] [2021-12-07 01:44:20,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761528995] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:20,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:20,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:44:20,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250783604] [2021-12-07 01:44:20,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:20,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:44:20,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:20,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:44:20,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:20,753 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:20,862 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-07 01:44:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:44:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-07 01:44:20,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:20,864 INFO L225 Difference]: With dead ends: 75 [2021-12-07 01:44:20,865 INFO L226 Difference]: Without dead ends: 75 [2021-12-07 01:44:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:20,867 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:20,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:44:20,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-07 01:44:20,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-07 01:44:20,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.711111111111111) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:20,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-07 01:44:20,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 7 [2021-12-07 01:44:20,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:20,877 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-07 01:44:20,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 01:44:20,877 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-07 01:44:20,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:44:20,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:20,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:20,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 01:44:21,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:21,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:21,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:21,081 INFO L85 PathProgramCache]: Analyzing trace with hash 649951808, now seen corresponding path program 1 times [2021-12-07 01:44:21,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:21,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1493097160] [2021-12-07 01:44:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:21,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:21,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:21,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:21,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 01:44:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:21,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:44:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:21,198 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 [2021-12-07 01:44:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:21,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:44:21,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1493097160] [2021-12-07 01:44:21,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1493097160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:21,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:21,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:44:21,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569773387] [2021-12-07 01:44:21,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:21,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:44:21,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:44:21,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:21,245 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:21,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:21,512 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-07 01:44:21,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:44:21,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-07 01:44:21,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:21,514 INFO L225 Difference]: With dead ends: 79 [2021-12-07 01:44:21,514 INFO L226 Difference]: Without dead ends: 79 [2021-12-07 01:44:21,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:44:21,516 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 10 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:21,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 261 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:44:21,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-07 01:44:21,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-07 01:44:21,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:21,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-07 01:44:21,526 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 13 [2021-12-07 01:44:21,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:21,526 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-07 01:44:21,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:21,527 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-07 01:44:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 01:44:21,528 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:21,528 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:21,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 01:44:21,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:21,730 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:21,732 INFO L85 PathProgramCache]: Analyzing trace with hash 649951809, now seen corresponding path program 1 times [2021-12-07 01:44:21,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:21,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2135602324] [2021-12-07 01:44:21,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:21,736 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:21,740 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:21,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 01:44:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:21,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:44:21,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:21,849 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 [2021-12-07 01:44:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:21,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:44:21,924 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:21,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2135602324] [2021-12-07 01:44:21,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2135602324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:21,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:21,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:44:21,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944565902] [2021-12-07 01:44:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:21,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:44:21,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:44:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:21,926 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:22,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:22,209 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-12-07 01:44:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:44:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-07 01:44:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:22,210 INFO L225 Difference]: With dead ends: 78 [2021-12-07 01:44:22,210 INFO L226 Difference]: Without dead ends: 78 [2021-12-07 01:44:22,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:44:22,211 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:22,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 277 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 01:44:22,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-07 01:44:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-12-07 01:44:22,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:22,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-12-07 01:44:22,217 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 13 [2021-12-07 01:44:22,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:22,217 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-12-07 01:44:22,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:22,217 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-12-07 01:44:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-07 01:44:22,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:22,218 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:22,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 01:44:22,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:22,419 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 87749440, now seen corresponding path program 1 times [2021-12-07 01:44:22,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:22,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [934042983] [2021-12-07 01:44:22,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:22,424 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:22,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:22,426 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:22,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 01:44:22,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:22,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:44:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:22,515 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:44:22,515 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:22,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [934042983] [2021-12-07 01:44:22,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [934042983] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:44:22,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:44:22,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:44:22,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242881529] [2021-12-07 01:44:22,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:44:22,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:44:22,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:44:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:22,518 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:22,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:22,525 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-07 01:44:22,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:44:22,526 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-07 01:44:22,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:22,527 INFO L225 Difference]: With dead ends: 79 [2021-12-07 01:44:22,527 INFO L226 Difference]: Without dead ends: 79 [2021-12-07 01:44:22,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:44:22,528 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:22,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 153 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-07 01:44:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-07 01:44:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:44:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-07 01:44:22,536 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 15 [2021-12-07 01:44:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:22,536 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-07 01:44:22,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-07 01:44:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-07 01:44:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-07 01:44:22,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:22,537 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:22,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 01:44:22,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:22,738 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:22,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:22,739 INFO L85 PathProgramCache]: Analyzing trace with hash -847170750, now seen corresponding path program 1 times [2021-12-07 01:44:22,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:22,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900464394] [2021-12-07 01:44:22,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:22,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:22,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:22,740 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:22,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 01:44:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:22,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:44:22,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:22,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:22,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 01:44:22,914 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:22,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900464394] [2021-12-07 01:44:22,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900464394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:44:22,914 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:44:22,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-07 01:44:22,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711532089] [2021-12-07 01:44:22,914 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:22,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:44:22,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:44:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:22,915 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:44:22,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:22,933 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-12-07 01:44:22,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:44:22,934 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-07 01:44:22,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:22,934 INFO L225 Difference]: With dead ends: 85 [2021-12-07 01:44:22,935 INFO L226 Difference]: Without dead ends: 85 [2021-12-07 01:44:22,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:44:22,935 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 11 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:22,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 305 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:44:22,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-07 01:44:22,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-12-07 01:44:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:22,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-12-07 01:44:22,940 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 28 [2021-12-07 01:44:22,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:22,941 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-12-07 01:44:22,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-07 01:44:22,941 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-12-07 01:44:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:44:22,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:22,942 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:22,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 01:44:23,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:23,144 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281600, now seen corresponding path program 2 times [2021-12-07 01:44:23,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704913406] [2021-12-07 01:44:23,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:44:23,148 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:23,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:23,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:23,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 01:44:23,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:44:23,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:44:23,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-07 01:44:23,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:23,340 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 [2021-12-07 01:44:23,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-07 01:44:23,510 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:44:23,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 32 [2021-12-07 01:44:23,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 01:44:23,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:23,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:44:23,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-12-07 01:44:25,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-07 01:44:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 6 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:44:26,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:26,193 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704913406] [2021-12-07 01:44:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704913406] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:26,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [741841067] [2021-12-07 01:44:26,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:44:26,194 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:26,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:44:26,195 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:44:26,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-07 01:44:26,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 1 [2021-12-07 01:44:26,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-07 01:44:26,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405038811] [2021-12-07 01:44:26,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:44:26,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:44:26,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:44:26,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:44:26,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-07 01:44:26,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:44:26,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:44:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-07 01:44:26,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:26,538 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 [2021-12-07 01:44:28,683 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:44:28,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-07 01:44:28,830 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-07 01:44:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-12-07 01:44:33,090 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-07 01:44:33,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-07 01:44:33,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 8 refuted. 4 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-07 01:44:33,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 01:44:33,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405038811] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:44:33,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 01:44:33,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 5] total 21 [2021-12-07 01:44:33,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088635189] [2021-12-07 01:44:33,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:33,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-12-07 01:44:33,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:33,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-12-07 01:44:33,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=417, Unknown=4, NotChecked=0, Total=506 [2021-12-07 01:44:33,880 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 22 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:44:36,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:36,616 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-07 01:44:36,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:44:36,616 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-07 01:44:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:36,617 INFO L225 Difference]: With dead ends: 132 [2021-12-07 01:44:36,617 INFO L226 Difference]: Without dead ends: 132 [2021-12-07 01:44:36,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 13 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=158, Invalid=768, Unknown=4, NotChecked=0, Total=930 [2021-12-07 01:44:36,618 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 70 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 326 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:36,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 761 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 257 Invalid, 0 Unknown, 326 Unchecked, 0.4s Time] [2021-12-07 01:44:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-07 01:44:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2021-12-07 01:44:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:36,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-07 01:44:36,624 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 41 [2021-12-07 01:44:36,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:36,624 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-07 01:44:36,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 3.65) internal successors, (73), 18 states have internal predecessors, (73), 4 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-07 01:44:36,624 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-07 01:44:36,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-07 01:44:36,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:36,625 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:36,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-07 01:44:36,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-07 01:44:37,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:37,028 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:37,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281601, now seen corresponding path program 1 times [2021-12-07 01:44:37,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:37,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [659406227] [2021-12-07 01:44:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:37,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:37,034 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:37,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 01:44:37,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:37,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-07 01:44:37,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:37,313 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 [2021-12-07 01:44:37,318 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 [2021-12-07 01:44:37,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:37,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-07 01:44:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:39,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:39,473 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-07 01:44:39,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-07 01:44:39,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:41,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:41,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:41,871 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-07 01:44:41,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-07 01:44:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:44:41,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:42,227 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [659406227] [2021-12-07 01:44:42,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [659406227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098776728] [2021-12-07 01:44:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:42,228 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:42,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:44:42,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:44:42,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-07 01:44:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:44:42,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:42,470 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 [2021-12-07 01:44:42,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:42,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:42,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:44,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:44,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:45,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-07 01:44:45,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:45,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-07 01:44:45,226 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-07 01:44:45,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:45,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098776728] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:45,890 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:44:45,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-12-07 01:44:45,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456116143] [2021-12-07 01:44:45,891 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:45,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-07 01:44:45,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-07 01:44:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=395, Unknown=3, NotChecked=0, Total=462 [2021-12-07 01:44:45,892 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:44:50,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:50,683 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-12-07 01:44:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-07 01:44:50,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-07 01:44:50,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:50,684 INFO L225 Difference]: With dead ends: 91 [2021-12-07 01:44:50,684 INFO L226 Difference]: Without dead ends: 91 [2021-12-07 01:44:50,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=108, Invalid=644, Unknown=4, NotChecked=0, Total=756 [2021-12-07 01:44:50,685 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 6 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:50,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 590 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 201 Unchecked, 0.4s Time] [2021-12-07 01:44:50,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-07 01:44:50,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-07 01:44:50,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-12-07 01:44:50,689 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 41 [2021-12-07 01:44:50,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:50,690 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-12-07 01:44:50,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-07 01:44:50,690 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-12-07 01:44:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 01:44:50,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:50,691 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:50,694 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-12-07 01:44:50,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-07 01:44:51,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:44:51,092 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:51,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1665526433, now seen corresponding path program 1 times [2021-12-07 01:44:51,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:51,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1959614723] [2021-12-07 01:44:51,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:51,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:51,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:51,093 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:51,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 01:44:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:51,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-07 01:44:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:51,321 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 [2021-12-07 01:44:51,530 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 19 treesize of output 15 [2021-12-07 01:44:51,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2021-12-07 01:44:51,831 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:44:51,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 42 [2021-12-07 01:44:51,952 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 30 treesize of output 18 [2021-12-07 01:44:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:44:52,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:52,268 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:52,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1959614723] [2021-12-07 01:44:52,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1959614723] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:52,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [608383800] [2021-12-07 01:44:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:52,269 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:44:52,270 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:44:52,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-07 01:44:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:52,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-07 01:44:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:52,600 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 [2021-12-07 01:44:52,991 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 19 treesize of output 15 [2021-12-07 01:44:53,244 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-07 01:44:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 42 [2021-12-07 01:44:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:53,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2021-12-07 01:44:53,402 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 32 treesize of output 20 [2021-12-07 01:44:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:44:53,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:53,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [608383800] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:53,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:44:53,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2021-12-07 01:44:53,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664127490] [2021-12-07 01:44:53,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:44:53,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-12-07 01:44:53,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:44:53,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-12-07 01:44:53,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=984, Unknown=3, NotChecked=0, Total=1122 [2021-12-07 01:44:53,597 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 32 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:44:54,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:44:54,674 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2021-12-07 01:44:54,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-07 01:44:54,675 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-07 01:44:54,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:44:54,676 INFO L225 Difference]: With dead ends: 137 [2021-12-07 01:44:54,676 INFO L226 Difference]: Without dead ends: 137 [2021-12-07 01:44:54,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 61 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=246, Invalid=1638, Unknown=8, NotChecked=0, Total=1892 [2021-12-07 01:44:54,677 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-07 01:44:54,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 577 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 362 Invalid, 0 Unknown, 188 Unchecked, 0.5s Time] [2021-12-07 01:44:54,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-12-07 01:44:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2021-12-07 01:44:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 86 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:44:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-12-07 01:44:54,681 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 44 [2021-12-07 01:44:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:44:54,681 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-12-07 01:44:54,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:44:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-12-07 01:44:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 01:44:54,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:44:54,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:44:54,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 01:44:54,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-07 01:44:55,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:55,085 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:44:55,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:44:55,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1665526434, now seen corresponding path program 1 times [2021-12-07 01:44:55,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:44:55,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1280774503] [2021-12-07 01:44:55,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:55,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:44:55,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:44:55,091 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:44:55,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 01:44:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:55,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-07 01:44:55,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:55,322 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 [2021-12-07 01:44:55,542 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 9 treesize of output 5 [2021-12-07 01:44:55,546 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 7 treesize of output 3 [2021-12-07 01:44:55,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:44:55,799 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-07 01:44:55,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:44:55,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:55,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:44:55,917 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 17 treesize of output 9 [2021-12-07 01:44:55,922 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 [2021-12-07 01:44:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:44:56,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:44:57,062 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:44:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1280774503] [2021-12-07 01:44:57,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1280774503] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:44:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1815589269] [2021-12-07 01:44:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:44:57,062 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:44:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:44:57,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:44:57,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-07 01:44:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:44:57,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 01:44:57,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:44:57,455 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 [2021-12-07 01:44:57,462 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 [2021-12-07 01:44:58,141 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 27 treesize of output 19 [2021-12-07 01:44:58,146 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 7 treesize of output 3 [2021-12-07 01:44:58,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:58,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 34 [2021-12-07 01:44:58,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:58,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-07 01:44:58,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:44:58,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:44:58,741 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-07 01:44:58,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-07 01:44:58,907 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 [2021-12-07 01:44:58,911 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 [2021-12-07 01:44:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 01:44:59,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:45:01,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1815589269] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:45:01,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:45:01,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-12-07 01:45:01,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140733249] [2021-12-07 01:45:01,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:45:01,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-07 01:45:01,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:01,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-07 01:45:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1264, Unknown=9, NotChecked=0, Total=1406 [2021-12-07 01:45:01,597 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 33 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:45:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:02,823 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2021-12-07 01:45:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-07 01:45:02,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-07 01:45:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:02,825 INFO L225 Difference]: With dead ends: 98 [2021-12-07 01:45:02,825 INFO L226 Difference]: Without dead ends: 98 [2021-12-07 01:45:02,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=208, Invalid=1847, Unknown=15, NotChecked=0, Total=2070 [2021-12-07 01:45:02,826 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 23 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:02,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 695 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 238 Invalid, 0 Unknown, 221 Unchecked, 0.4s Time] [2021-12-07 01:45:02,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-07 01:45:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-12-07 01:45:02,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 86 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:02,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-12-07 01:45:02,830 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 44 [2021-12-07 01:45:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:02,831 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-12-07 01:45:02,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-07 01:45:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-12-07 01:45:02,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-07 01:45:02,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:02,832 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:02,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-12-07 01:45:03,066 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 01:45:03,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:03,234 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:03,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:03,235 INFO L85 PathProgramCache]: Analyzing trace with hash 91710248, now seen corresponding path program 1 times [2021-12-07 01:45:03,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:03,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [67193171] [2021-12-07 01:45:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:03,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:03,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:03,239 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:03,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 01:45:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:03,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:45:03,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-07 01:45:03,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:03,400 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:03,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [67193171] [2021-12-07 01:45:03,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [67193171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:03,401 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:03,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:45:03,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169798295] [2021-12-07 01:45:03,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:03,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:03,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:03,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:03,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:03,402 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:03,439 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2021-12-07 01:45:03,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 01:45:03,439 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-07 01:45:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:03,440 INFO L225 Difference]: With dead ends: 94 [2021-12-07 01:45:03,440 INFO L226 Difference]: Without dead ends: 94 [2021-12-07 01:45:03,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:03,441 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 61 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:03,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 146 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:45:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-12-07 01:45:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-12-07 01:45:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.4153846153846155) internal successors, (92), 86 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2021-12-07 01:45:03,444 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 45 [2021-12-07 01:45:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:03,444 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2021-12-07 01:45:03,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2021-12-07 01:45:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-12-07 01:45:03,445 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:03,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:03,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:03,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:03,647 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:03,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2059192403, now seen corresponding path program 1 times [2021-12-07 01:45:03,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:03,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1975342734] [2021-12-07 01:45:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:03,651 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:03,653 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:03,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-07 01:45:03,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:03,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:45:03,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:03,851 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-07 01:45:03,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:45:04,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-07 01:45:04,496 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:04,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1975342734] [2021-12-07 01:45:04,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1975342734] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:45:04,496 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:45:04,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 01:45:04,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010965261] [2021-12-07 01:45:04,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:45:04,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 01:45:04,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 01:45:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-07 01:45:04,497 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:45:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:04,541 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2021-12-07 01:45:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:45:04,542 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-12-07 01:45:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:04,543 INFO L225 Difference]: With dead ends: 90 [2021-12-07 01:45:04,543 INFO L226 Difference]: Without dead ends: 90 [2021-12-07 01:45:04,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-07 01:45:04,543 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 156 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:04,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 202 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:45:04,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-07 01:45:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-07 01:45:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.375) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-12-07 01:45:04,546 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 47 [2021-12-07 01:45:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:04,546 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-12-07 01:45:04,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-07 01:45:04,546 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-12-07 01:45:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:45:04,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:04,547 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:04,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-07 01:45:04,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:04,749 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:04,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:04,750 INFO L85 PathProgramCache]: Analyzing trace with hash 589543324, now seen corresponding path program 1 times [2021-12-07 01:45:04,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:04,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979494039] [2021-12-07 01:45:04,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:04,752 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:04,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:04,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:04,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 01:45:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:04,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 01:45:04,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-07 01:45:04,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:04,992 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:04,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979494039] [2021-12-07 01:45:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979494039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:04,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:04,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:45:04,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691110972] [2021-12-07 01:45:04,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:04,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:04,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:04,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:04,993 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:05,123 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2021-12-07 01:45:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:45:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-07 01:45:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:05,124 INFO L225 Difference]: With dead ends: 101 [2021-12-07 01:45:05,124 INFO L226 Difference]: Without dead ends: 101 [2021-12-07 01:45:05,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:05,124 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 43 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:05,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 121 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:45:05,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-12-07 01:45:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2021-12-07 01:45:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 64 states have (on average 1.359375) internal successors, (87), 82 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2021-12-07 01:45:05,127 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 48 [2021-12-07 01:45:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:05,127 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2021-12-07 01:45:05,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2021-12-07 01:45:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:45:05,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:05,128 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:05,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 01:45:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:05,330 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:05,331 INFO L85 PathProgramCache]: Analyzing trace with hash 589543325, now seen corresponding path program 1 times [2021-12-07 01:45:05,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:05,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18569227] [2021-12-07 01:45:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:05,333 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:05,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:05,335 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:05,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-07 01:45:05,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:05,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:45:05,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-07 01:45:05,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:05,564 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18569227] [2021-12-07 01:45:05,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18569227] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:05,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:05,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:45:05,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326032443] [2021-12-07 01:45:05,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:05,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:05,566 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:05,778 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-12-07 01:45:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:45:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-07 01:45:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:05,780 INFO L225 Difference]: With dead ends: 88 [2021-12-07 01:45:05,780 INFO L226 Difference]: Without dead ends: 88 [2021-12-07 01:45:05,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:05,781 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 45 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:05,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 117 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:45:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-07 01:45:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-07 01:45:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.34375) internal successors, (86), 81 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-12-07 01:45:05,783 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 48 [2021-12-07 01:45:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:05,784 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-12-07 01:45:05,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.333333333333334) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:05,784 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-12-07 01:45:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:45:05,784 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:05,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:05,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:05,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:05,986 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:05,987 INFO L85 PathProgramCache]: Analyzing trace with hash 589543484, now seen corresponding path program 1 times [2021-12-07 01:45:05,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833059517] [2021-12-07 01:45:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:05,989 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:05,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:05,992 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:05,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 01:45:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:06,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-07 01:45:06,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 01:45:06,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:06,165 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:06,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833059517] [2021-12-07 01:45:06,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833059517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:06,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 01:45:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155841722] [2021-12-07 01:45:06,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:06,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 01:45:06,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 01:45:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:06,167 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:06,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:06,255 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2021-12-07 01:45:06,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 01:45:06,255 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2021-12-07 01:45:06,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:06,256 INFO L225 Difference]: With dead ends: 99 [2021-12-07 01:45:06,256 INFO L226 Difference]: Without dead ends: 99 [2021-12-07 01:45:06,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 01:45:06,257 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:06,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 75 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:45:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-12-07 01:45:06,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 87. [2021-12-07 01:45:06,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.328125) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:06,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-12-07 01:45:06,259 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 48 [2021-12-07 01:45:06,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:06,259 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-12-07 01:45:06,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:06,260 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-12-07 01:45:06,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-07 01:45:06,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:06,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:06,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:06,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:06,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:06,466 INFO L85 PathProgramCache]: Analyzing trace with hash 589543485, now seen corresponding path program 1 times [2021-12-07 01:45:06,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444722788] [2021-12-07 01:45:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:06,468 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:06,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:06,471 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:06,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 01:45:06,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:06,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 01:45:06,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 01:45:06,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:06,672 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:06,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444722788] [2021-12-07 01:45:06,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444722788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:06,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:06,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:45:06,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569726248] [2021-12-07 01:45:06,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:06,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:45:06,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:45:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:06,674 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:06,789 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2021-12-07 01:45:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:45:06,789 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2021-12-07 01:45:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:06,790 INFO L225 Difference]: With dead ends: 86 [2021-12-07 01:45:06,790 INFO L226 Difference]: Without dead ends: 86 [2021-12-07 01:45:06,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:45:06,791 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 98 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:06,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 94 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:45:06,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-07 01:45:06,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-07 01:45:06,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 64 states have (on average 1.3125) internal successors, (84), 79 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:06,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2021-12-07 01:45:06,794 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 48 [2021-12-07 01:45:06,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:06,794 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2021-12-07 01:45:06,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2021-12-07 01:45:06,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:45:06,795 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:06,795 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:06,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:45:06,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:06,996 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:06,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:06,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1095973889, now seen corresponding path program 1 times [2021-12-07 01:45:06,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:06,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1383496879] [2021-12-07 01:45:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:06,999 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:07,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:07,002 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:07,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:45:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:07,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 01:45:07,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:07,195 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 [2021-12-07 01:45:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:45:07,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:07,234 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:07,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1383496879] [2021-12-07 01:45:07,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1383496879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:07,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:07,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:45:07,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368486648] [2021-12-07 01:45:07,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:07,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:45:07,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:07,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:45:07,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:45:07,235 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:07,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:07,461 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2021-12-07 01:45:07,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:45:07,461 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-07 01:45:07,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:07,462 INFO L225 Difference]: With dead ends: 97 [2021-12-07 01:45:07,462 INFO L226 Difference]: Without dead ends: 97 [2021-12-07 01:45:07,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:45:07,463 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 39 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:07,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 177 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:45:07,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-12-07 01:45:07,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 85. [2021-12-07 01:45:07,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.296875) internal successors, (83), 78 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:07,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2021-12-07 01:45:07,467 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 49 [2021-12-07 01:45:07,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:07,467 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2021-12-07 01:45:07,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:07,467 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2021-12-07 01:45:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-07 01:45:07,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:07,467 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:07,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 01:45:07,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:07,669 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1095973890, now seen corresponding path program 1 times [2021-12-07 01:45:07,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:07,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [160710816] [2021-12-07 01:45:07,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:07,672 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:07,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:07,674 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:07,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:45:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:07,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-07 01:45:07,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:07,880 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 [2021-12-07 01:45:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-07 01:45:07,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:07,953 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:07,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [160710816] [2021-12-07 01:45:07,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [160710816] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:07,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:07,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 01:45:07,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326536437] [2021-12-07 01:45:07,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:07,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 01:45:07,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:07,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 01:45:07,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:45:07,955 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:08,212 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2021-12-07 01:45:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:45:08,213 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2021-12-07 01:45:08,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:08,213 INFO L225 Difference]: With dead ends: 84 [2021-12-07 01:45:08,213 INFO L226 Difference]: Without dead ends: 84 [2021-12-07 01:45:08,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 01:45:08,214 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 41 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:08,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 01:45:08,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-07 01:45:08,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-12-07 01:45:08,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 64 states have (on average 1.28125) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:08,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-12-07 01:45:08,217 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 49 [2021-12-07 01:45:08,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:08,217 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-12-07 01:45:08,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-07 01:45:08,217 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-12-07 01:45:08,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 01:45:08,218 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:08,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:08,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:08,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:08,419 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:08,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:08,420 INFO L85 PathProgramCache]: Analyzing trace with hash 963920866, now seen corresponding path program 1 times [2021-12-07 01:45:08,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:08,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [182917969] [2021-12-07 01:45:08,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:08,422 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:08,425 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:08,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 01:45:08,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:08,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 01:45:08,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 01:45:08,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:08,630 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:08,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [182917969] [2021-12-07 01:45:08,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [182917969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:08,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:08,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 01:45:08,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127977092] [2021-12-07 01:45:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:08,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 01:45:08,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 01:45:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 01:45:08,631 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:08,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:08,738 INFO L93 Difference]: Finished difference Result 95 states and 100 transitions. [2021-12-07 01:45:08,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 01:45:08,739 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-07 01:45:08,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:08,740 INFO L225 Difference]: With dead ends: 95 [2021-12-07 01:45:08,740 INFO L226 Difference]: Without dead ends: 95 [2021-12-07 01:45:08,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:08,740 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 89 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:08,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 88 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:45:08,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-12-07 01:45:08,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 83. [2021-12-07 01:45:08,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 64 states have (on average 1.265625) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:08,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2021-12-07 01:45:08,743 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 51 [2021-12-07 01:45:08,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:08,743 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2021-12-07 01:45:08,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.333333333333334) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:08,743 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2021-12-07 01:45:08,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-07 01:45:08,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:08,744 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:08,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-07 01:45:08,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:08,945 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash 963920867, now seen corresponding path program 1 times [2021-12-07 01:45:08,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:08,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900328455] [2021-12-07 01:45:08,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:08,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:08,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:08,950 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:08,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:45:09,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:09,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:45:09,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-07 01:45:09,238 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 01:45:09,238 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:09,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900328455] [2021-12-07 01:45:09,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900328455] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 01:45:09,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 01:45:09,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 01:45:09,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26418197] [2021-12-07 01:45:09,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 01:45:09,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 01:45:09,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 01:45:09,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 01:45:09,240 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:09,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:45:09,373 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-12-07 01:45:09,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 01:45:09,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2021-12-07 01:45:09,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:45:09,375 INFO L225 Difference]: With dead ends: 81 [2021-12-07 01:45:09,375 INFO L226 Difference]: Without dead ends: 81 [2021-12-07 01:45:09,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-12-07 01:45:09,375 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 77 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:09,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 90 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 01:45:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-07 01:45:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-07 01:45:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 64 states have (on average 1.234375) internal successors, (79), 74 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-07 01:45:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-12-07 01:45:09,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 51 [2021-12-07 01:45:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:45:09,378 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-12-07 01:45:09,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) internal successors, (28), 5 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-07 01:45:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-12-07 01:45:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-07 01:45:09,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:45:09,379 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:45:09,387 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-07 01:45:09,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:09,580 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-07 01:45:09,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:45:09,581 INFO L85 PathProgramCache]: Analyzing trace with hash 15214980, now seen corresponding path program 1 times [2021-12-07 01:45:09,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:45:09,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501429077] [2021-12-07 01:45:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:09,583 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:45:09,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:45:09,585 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:45:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-07 01:45:09,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:09,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-07 01:45:09,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:10,067 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 7 treesize of output 3 [2021-12-07 01:45:10,187 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1354 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_1354) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|)) is different from true [2021-12-07 01:45:10,198 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1354 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res#1.base| v_ArrVal_1354) |c_#memory_$Pointer$.base|)) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (bvult |c_node_create_#res#1.base| |c_#StackHeapBarrier|)) is different from true [2021-12-07 01:45:10,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:45:10,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-07 01:45:10,704 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-07 01:45:10,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 33 [2021-12-07 01:45:10,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:45:10,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-12-07 01:45:10,943 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 32 treesize of output 20 [2021-12-07 01:45:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 6 not checked. [2021-12-07 01:45:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:45:11,233 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))))) is different from false [2021-12-07 01:45:11,246 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) (_ bv1 1)))) is different from false [2021-12-07 01:45:11,270 INFO L354 Elim1Store]: treesize reduction 5, result has 72.2 percent of original size [2021-12-07 01:45:11,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2021-12-07 01:45:11,277 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~snd_to_last~0#1.base| v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-07 01:45:11,284 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_sll_insert_~last~0#1.base| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~last~0#1.base| v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) is different from false [2021-12-07 01:45:11,291 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_#t~mem8#1.base| v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_insert_#t~mem8#1.base|)) is different from false [2021-12-07 01:45:11,298 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_~new_node~0#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) .cse0))) is different from false [2021-12-07 01:45:11,307 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1355 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1356 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_insert_~head#1.base|) |c_ULTIMATE.start_sll_insert_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1355) |c_ULTIMATE.start_sll_insert_#t~ret7#1.base| v_ArrVal_1356) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2021-12-07 01:45:11,514 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:45:11,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501429077] [2021-12-07 01:45:11,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501429077] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 01:45:11,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1020871739] [2021-12-07 01:45:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:11,514 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-07 01:45:11,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-07 01:45:11,515 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-07 01:45:11,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-07 01:45:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:45:11,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-07 01:45:11,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:45:12,096 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 [2021-12-07 01:45:13,148 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-12-07 01:45:13,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2021-12-07 01:45:13,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-07 01:45:13,406 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-07 01:45:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 66 [2021-12-07 01:45:13,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-07 01:45:13,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926863083] [2021-12-07 01:45:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:45:13,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 01:45:13,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 01:45:13,412 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 01:45:13,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-12-07 01:45:13,465 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2eb1977b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.variables.ProgramVarUtils.constructConstantForAuxVar(ProgramVarUtils.java:119) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.computeClosedFormula(UnmodifiableTransFormula.java:172) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.(UnmodifiableTransFormula.java:95) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:274) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.decoupleArrayValues(TransFormulaUtils.java:1226) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:388) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-07 01:45:13,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-07 01:45:13,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2021-12-07 01:45:13,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116463943] [2021-12-07 01:45:13,467 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-07 01:45:13,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-07 01:45:13,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:45:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-07 01:45:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1357, Unknown=27, NotChecked=738, Total=2256 [2021-12-07 01:45:13,468 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-07 01:45:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 01:45:13,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=134, Invalid=1357, Unknown=27, NotChecked=738, Total=2256 [2021-12-07 01:45:13,469 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 01:45:13,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 01:45:13,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-12-07 01:45:13,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-07 01:45:13,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-07 01:45:14,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:45:14,072 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2eb1977b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-07 01:45:14,078 INFO L158 Benchmark]: Toolchain (without parser) took 55070.53ms. Allocated memory was 48.2MB in the beginning and 73.4MB in the end (delta: 25.2MB). Free memory was 22.9MB in the beginning and 21.1MB in the end (delta: 1.8MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,078 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory is still 28.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 01:45:14,079 INFO L158 Benchmark]: CACSL2BoogieTranslator took 339.96ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 22.7MB in the beginning and 35.1MB in the end (delta: -12.4MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,079 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.86ms. Allocated memory is still 60.8MB. Free memory was 34.9MB in the beginning and 32.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,079 INFO L158 Benchmark]: Boogie Preprocessor took 33.78ms. Allocated memory is still 60.8MB. Free memory was 32.6MB in the beginning and 31.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,080 INFO L158 Benchmark]: RCFGBuilder took 472.75ms. Allocated memory is still 60.8MB. Free memory was 30.8MB in the beginning and 27.6MB in the end (delta: 3.2MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,080 INFO L158 Benchmark]: TraceAbstraction took 54169.50ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 27.3MB in the beginning and 21.1MB in the end (delta: 6.2MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. [2021-12-07 01:45:14,081 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 48.2MB. Free memory is still 28.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 339.96ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 22.7MB in the beginning and 35.1MB in the end (delta: -12.4MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.86ms. Allocated memory is still 60.8MB. Free memory was 34.9MB in the beginning and 32.9MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 33.78ms. Allocated memory is still 60.8MB. Free memory was 32.6MB in the beginning and 31.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 472.75ms. Allocated memory is still 60.8MB. Free memory was 30.8MB in the beginning and 27.6MB in the end (delta: 3.2MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. * TraceAbstraction took 54169.50ms. Allocated memory was 60.8MB in the beginning and 73.4MB in the end (delta: 12.6MB). Free memory was 27.3MB in the beginning and 21.1MB in the end (delta: 6.2MB). Peak memory consumption was 18.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2eb1977b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2eb1977b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-07 01:45:14,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_470e1bec-c81b-47e7-9d18-2b9dabc030c6/bin/uautomizer-DrprNOufMa/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: ERROR: ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2eb1977b