./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:11:05,373 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:11:05,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:11:05,419 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:11:05,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:11:05,424 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:11:05,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:11:05,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:11:05,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:11:05,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:11:05,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:11:05,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:11:05,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:11:05,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:11:05,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:11:05,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:11:05,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:11:05,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:11:05,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:11:05,461 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:11:05,464 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:11:05,466 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:11:05,469 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:11:05,470 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:11:05,481 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:11:05,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:11:05,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:11:05,484 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:11:05,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:11:05,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:11:05,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:11:05,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:11:05,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:11:05,491 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:11:05,492 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:11:05,492 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:11:05,493 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:11:05,493 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:11:05,494 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:11:05,495 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:11:05,496 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:11:05,497 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:11:05,538 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:11:05,538 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:11:05,539 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:11:05,539 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:11:05,540 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:11:05,540 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:11:05,541 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:11:05,541 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:11:05,541 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:11:05,541 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:11:05,543 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:11:05,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:11:05,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:11:05,543 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:11:05,543 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:11:05,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:11:05,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:11:05,544 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:11:05,544 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:11:05,544 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:11:05,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:11:05,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:11:05,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:11:05,545 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:11:05,545 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:05,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:11:05,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:11:05,546 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:11:05,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:11:05,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:11:05,547 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:11:05,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:11:05,548 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:11:05,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:11:05,548 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2022-11-25 17:11:05,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:11:05,844 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:11:05,847 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:11:05,849 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:11:05,849 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:11:05,851 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-25 17:11:08,981 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:11:09,203 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:11:09,204 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-25 17:11:09,214 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/data/07eccc412/25ce8cb90fae429eab28249fa3a73ebf/FLAGf273437c4 [2022-11-25 17:11:09,229 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/data/07eccc412/25ce8cb90fae429eab28249fa3a73ebf [2022-11-25 17:11:09,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:11:09,233 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:11:09,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:09,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:11:09,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:11:09,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14210323 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09, skipping insertion in model container [2022-11-25 17:11:09,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:11:09,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:11:09,431 WARN L237 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_e94111d6-f187-439d-adbb-079ee7fc6d80/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-25 17:11:09,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:09,457 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:11:09,471 WARN L237 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_e94111d6-f187-439d-adbb-079ee7fc6d80/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-25 17:11:09,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:11:09,492 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:11:09,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09 WrapperNode [2022-11-25 17:11:09,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:11:09,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:09,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:11:09,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:11:09,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,510 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,529 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-11-25 17:11:09,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:11:09,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:11:09,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:11:09,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:11:09,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,542 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,542 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:11:09,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:11:09,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:11:09,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:11:09,556 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (1/1) ... [2022-11-25 17:11:09,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:11:09,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:09,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:11:09,613 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:11:09,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:11:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:11:09,637 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:11:09,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:11:09,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:11:09,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:11:09,727 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:11:09,730 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:11:09,973 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:11:09,986 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:11:10,002 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:11:10,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:10 BoogieIcfgContainer [2022-11-25 17:11:10,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:11:10,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:11:10,008 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:11:10,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:11:10,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:11:09" (1/3) ... [2022-11-25 17:11:10,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509c5e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:10, skipping insertion in model container [2022-11-25 17:11:10,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:11:09" (2/3) ... [2022-11-25 17:11:10,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509c5e7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:11:10, skipping insertion in model container [2022-11-25 17:11:10,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:10" (3/3) ... [2022-11-25 17:11:10,015 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2022-11-25 17:11:10,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:11:10,065 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:11:10,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:11:10,186 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@18f9eeef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:11:10,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:11:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:11:10,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-25 17:11:10,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:10,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:10,210 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:10,223 INFO L85 PathProgramCache]: Analyzing trace with hash -167421905, now seen corresponding path program 1 times [2022-11-25 17:11:10,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:10,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626939804] [2022-11-25 17:11:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:10,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:10,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:10,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626939804] [2022-11-25 17:11:10,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626939804] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:10,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:10,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:11:10,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470162912] [2022-11-25 17:11:10,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:10,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:11:10,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:10,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:11:10,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:11:10,558 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-11-25 17:11:10,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:10,582 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2022-11-25 17:11:10,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:11:10,584 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2022-11-25 17:11:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:10,604 INFO L225 Difference]: With dead ends: 56 [2022-11-25 17:11:10,604 INFO L226 Difference]: Without dead ends: 26 [2022-11-25 17:11:10,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:11:10,611 INFO L413 NwaCegarLoop]: 42 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, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:10,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:11:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-25 17:11:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-25 17:11:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:11:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-11-25 17:11:10,654 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 11 [2022-11-25 17:11:10,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:10,655 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-11-25 17:11:10,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-11-25 17:11:10,655 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-11-25 17:11:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-25 17:11:10,657 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:10,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:10,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:11:10,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:10,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831489, now seen corresponding path program 1 times [2022-11-25 17:11:10,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:10,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223232593] [2022-11-25 17:11:10,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:10,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223232593] [2022-11-25 17:11:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223232593] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:10,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:10,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 17:11:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703613239] [2022-11-25 17:11:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:11:10,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:11:10,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:11:10,840 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 17:11:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:10,946 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-11-25 17:11:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:11:10,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 12 [2022-11-25 17:11:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:10,948 INFO L225 Difference]: With dead ends: 32 [2022-11-25 17:11:10,948 INFO L226 Difference]: Without dead ends: 30 [2022-11-25 17:11:10,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:10,950 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:10,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 69 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:10,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-25 17:11:10,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-25 17:11:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:11:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-11-25 17:11:10,963 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-11-25 17:11:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:10,963 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-11-25 17:11:10,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-11-25 17:11:10,964 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-11-25 17:11:10,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-25 17:11:10,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:10,965 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:10,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:11:10,966 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:10,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:10,967 INFO L85 PathProgramCache]: Analyzing trace with hash 2126947644, now seen corresponding path program 1 times [2022-11-25 17:11:10,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:10,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880409478] [2022-11-25 17:11:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:11:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:11:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:11,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880409478] [2022-11-25 17:11:11,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880409478] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:11,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:11,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:11:11,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469224791] [2022-11-25 17:11:11,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:11,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:11,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:11,177 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 17:11:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:11,360 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-11-25 17:11:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:11:11,361 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-25 17:11:11,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:11,362 INFO L225 Difference]: With dead ends: 45 [2022-11-25 17:11:11,362 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 17:11:11,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:11,369 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:11,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:11,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 17:11:11,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-11-25 17:11:11,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:11:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-11-25 17:11:11,389 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2022-11-25 17:11:11,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:11,390 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-11-25 17:11:11,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 17:11:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-11-25 17:11:11,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-25 17:11:11,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:11,397 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:11,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:11:11,397 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:11,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2018842485, now seen corresponding path program 1 times [2022-11-25 17:11:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147904914] [2022-11-25 17:11:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:11,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:11:11,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147904914] [2022-11-25 17:11:11,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147904914] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:11,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:11,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 17:11:11,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41248781] [2022-11-25 17:11:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:11,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:11:11,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:11:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:11:11,576 INFO L87 Difference]: Start difference. First operand 41 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:11:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:11,700 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-11-25 17:11:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:11:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-11-25 17:11:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:11,702 INFO L225 Difference]: With dead ends: 52 [2022-11-25 17:11:11,703 INFO L226 Difference]: Without dead ends: 50 [2022-11-25 17:11:11,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:11,704 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:11,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 188 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:11,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-25 17:11:11,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-11-25 17:11:11,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 31 states have internal predecessors, (33), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-25 17:11:11,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-25 17:11:11,722 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2022-11-25 17:11:11,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:11,723 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-25 17:11:11,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:11:11,723 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-25 17:11:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-25 17:11:11,725 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:11,725 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:11,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:11:11,725 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:11,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:11,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488141, now seen corresponding path program 1 times [2022-11-25 17:11:11,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:11,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102630999] [2022-11-25 17:11:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:11,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:11,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-11-25 17:11:11,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-11-25 17:11:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-25 17:11:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:11:11,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:11,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102630999] [2022-11-25 17:11:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102630999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:11,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:11:11,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17949581] [2022-11-25 17:11:11,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:11,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:11:11,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:11,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:11:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:11:11,948 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:11:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:12,198 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-11-25 17:11:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:11:12,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-25 17:11:12,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:12,208 INFO L225 Difference]: With dead ends: 71 [2022-11-25 17:11:12,208 INFO L226 Difference]: Without dead ends: 64 [2022-11-25 17:11:12,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:11:12,213 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:12,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 99 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:11:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-25 17:11:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-11-25 17:11:12,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 42 states have internal predecessors, (44), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:11:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-11-25 17:11:12,243 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2022-11-25 17:11:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:12,243 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-11-25 17:11:12,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:11:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-11-25 17:11:12,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 17:11:12,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:12,246 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:12,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:11:12,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:12,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:12,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1722491344, now seen corresponding path program 1 times [2022-11-25 17:11:12,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:12,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928430639] [2022-11-25 17:11:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:12,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:11:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:11:12,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:12,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928430639] [2022-11-25 17:11:12,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928430639] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:11:12,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:11:12,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:11:12,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332811710] [2022-11-25 17:11:12,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:11:12,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:11:12,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:11:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:11:12,397 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:11:12,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:12,580 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-11-25 17:11:12,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:11:12,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-25 17:11:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:12,585 INFO L225 Difference]: With dead ends: 73 [2022-11-25 17:11:12,585 INFO L226 Difference]: Without dead ends: 71 [2022-11-25 17:11:12,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:11:12,592 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:12,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 146 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-25 17:11:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-11-25 17:11:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.119047619047619) internal successors, (47), 45 states have internal predecessors, (47), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:11:12,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-11-25 17:11:12,614 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2022-11-25 17:11:12,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:12,618 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-11-25 17:11:12,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-25 17:11:12,619 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-11-25 17:11:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-25 17:11:12,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:12,630 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:12,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:11:12,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:12,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1030091550, now seen corresponding path program 1 times [2022-11-25 17:11:12,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:12,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654671731] [2022-11-25 17:11:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:12,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:11:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:11:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-11-25 17:11:12,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-25 17:11:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-25 17:11:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 17:11:12,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654671731] [2022-11-25 17:11:12,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654671731] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:12,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654965435] [2022-11-25 17:11:12,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:12,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:12,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:12,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:12,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:11:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:11:13,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 17:11:13,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-25 17:11:13,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654965435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:13,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-11-25 17:11:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365789023] [2022-11-25 17:11:13,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:13,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 17:11:13,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 17:11:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-25 17:11:13,645 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-25 17:11:14,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:14,353 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-11-25 17:11:14,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 17:11:14,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 53 [2022-11-25 17:11:14,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:14,357 INFO L225 Difference]: With dead ends: 108 [2022-11-25 17:11:14,357 INFO L226 Difference]: Without dead ends: 93 [2022-11-25 17:11:14,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2022-11-25 17:11:14,359 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:14,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 140 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:11:14,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-25 17:11:14,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-11-25 17:11:14,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 17:11:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-11-25 17:11:14,377 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 53 [2022-11-25 17:11:14,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:14,378 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-11-25 17:11:14,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.5625) internal successors, (41), 17 states have internal predecessors, (41), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-25 17:11:14,378 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-11-25 17:11:14,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-25 17:11:14,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:14,379 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:14,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:14,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:14,586 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:14,587 INFO L85 PathProgramCache]: Analyzing trace with hash 302113055, now seen corresponding path program 1 times [2022-11-25 17:11:14,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:14,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791957715] [2022-11-25 17:11:14,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:14,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:14,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:11:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:11:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:11:14,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:11:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 17:11:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 17:11:14,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791957715] [2022-11-25 17:11:14,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791957715] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:14,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319229096] [2022-11-25 17:11:14,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:14,750 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:14,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:11:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:11:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 17:11:15,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:15,129 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-25 17:11:15,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319229096] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:15,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:15,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-11-25 17:11:15,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347323092] [2022-11-25 17:11:15,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:15,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:11:15,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:15,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:11:15,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:11:15,135 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 17:11:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:15,326 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2022-11-25 17:11:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:11:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2022-11-25 17:11:15,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:15,329 INFO L225 Difference]: With dead ends: 94 [2022-11-25 17:11:15,329 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 17:11:15,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-11-25 17:11:15,332 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:15,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 200 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:11:15,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 17:11:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-25 17:11:15,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 61 states have internal predecessors, (63), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 17:11:15,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2022-11-25 17:11:15,370 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 55 [2022-11-25 17:11:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:15,371 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2022-11-25 17:11:15,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-25 17:11:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2022-11-25 17:11:15,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-25 17:11:15,374 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:15,374 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:15,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:15,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:15,581 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:15,581 INFO L85 PathProgramCache]: Analyzing trace with hash 847231248, now seen corresponding path program 2 times [2022-11-25 17:11:15,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:15,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176526348] [2022-11-25 17:11:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:11:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:11:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:11:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:11:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 17:11:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:11:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-25 17:11:15,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-25 17:11:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 17:11:15,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:15,890 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-11-25 17:11:15,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176526348] [2022-11-25 17:11:15,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176526348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:15,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415284557] [2022-11-25 17:11:15,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:11:15,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:15,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:15,892 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:15,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:11:15,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:11:15,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 17:11:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:16,352 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 17:11:16,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:16,674 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-25 17:11:16,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415284557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:16,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:16,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 28 [2022-11-25 17:11:16,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387034929] [2022-11-25 17:11:16,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:16,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-25 17:11:16,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:16,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-25 17:11:16,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-11-25 17:11:16,678 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-25 17:11:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:17,649 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2022-11-25 17:11:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-25 17:11:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) Word has length 80 [2022-11-25 17:11:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:17,651 INFO L225 Difference]: With dead ends: 109 [2022-11-25 17:11:17,651 INFO L226 Difference]: Without dead ends: 107 [2022-11-25 17:11:17,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=1756, Unknown=0, NotChecked=0, Total=2162 [2022-11-25 17:11:17,653 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 150 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:17,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 98 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 17:11:17,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-25 17:11:17,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-11-25 17:11:17,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-25 17:11:17,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-11-25 17:11:17,680 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 80 [2022-11-25 17:11:17,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:17,680 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-11-25 17:11:17,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 27 states have internal predecessors, (65), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 12 states have call successors, (29) [2022-11-25 17:11:17,681 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-11-25 17:11:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-25 17:11:17,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:11:17,684 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:17,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:17,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:17,890 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:11:17,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:11:17,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1329001986, now seen corresponding path program 2 times [2022-11-25 17:11:17,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:11:17,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87283733] [2022-11-25 17:11:17,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:11:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:11:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-25 17:11:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-25 17:11:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-25 17:11:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-25 17:11:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-25 17:11:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-11-25 17:11:18,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-25 17:11:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-25 17:11:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-25 17:11:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-25 17:11:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-25 17:11:18,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-11-25 17:11:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-11-25 17:11:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-11-25 17:11:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-11-25 17:11:18,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:11:18,270 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-11-25 17:11:18,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:11:18,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87283733] [2022-11-25 17:11:18,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87283733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:11:18,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568311299] [2022-11-25 17:11:18,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:11:18,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:11:18,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:11:18,273 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:11:18,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:11:18,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:11:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:11:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-25 17:11:18,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:11:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 64 proven. 69 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-25 17:11:18,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:11:18,937 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 71 proven. 62 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2022-11-25 17:11:18,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568311299] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:11:18,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:11:18,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 16 [2022-11-25 17:11:18,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127693855] [2022-11-25 17:11:18,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:11:18,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 17:11:18,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:11:18,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 17:11:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-25 17:11:18,942 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-25 17:11:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:11:19,320 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-11-25 17:11:19,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:11:19,321 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2022-11-25 17:11:19,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:11:19,322 INFO L225 Difference]: With dead ends: 96 [2022-11-25 17:11:19,322 INFO L226 Difference]: Without dead ends: 0 [2022-11-25 17:11:19,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 227 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-11-25 17:11:19,324 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:11:19,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 166 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:11:19,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-25 17:11:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-25 17:11:19,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:11:19,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-25 17:11:19,325 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2022-11-25 17:11:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:11:19,326 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 17:11:19,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 states have internal predecessors, (43), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-25 17:11:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-25 17:11:19,326 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-25 17:11:19,328 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-25 17:11:19,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:11:19,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:11:19,531 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-25 17:11:20,440 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-11-25 17:11:20,440 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2022-11-25 17:11:20,441 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-25 17:11:20,441 INFO L895 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-25 17:11:20,441 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 45) no Hoare annotation was computed. [2022-11-25 17:11:20,441 INFO L899 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2022-11-25 17:11:20,441 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-11-25 17:11:20,441 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-25 17:11:20,442 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-11-25 17:11:20,442 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-11-25 17:11:20,442 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2) (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-25 17:11:20,442 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-25 17:11:20,442 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 3) |ULTIMATE.start_main_~bufferlen~0#1|)) (and (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-25 17:11:20,442 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2022-11-25 17:11:20,443 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse2 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) .cse0 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2) (and (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-25 17:11:20,443 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-11-25 17:11:20,443 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-25 17:11:20,443 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-11-25 17:11:20,443 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2022-11-25 17:11:20,443 INFO L895 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|)) (<= 1 |ULTIMATE.start_main_~in~0#1|) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)) [2022-11-25 17:11:20,444 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-11-25 17:11:20,444 INFO L902 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2022-11-25 17:11:20,444 INFO L902 garLoopResultBuilder]: At program point L55-1(lines 24 56) the Hoare annotation is: true [2022-11-25 17:11:20,444 INFO L895 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_main_~bufferlen~0#1| (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (.cse1 (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|))) (or (and (< 0 (+ |ULTIMATE.start_main_~buflim~0#1| 1)) (= |ULTIMATE.start_main_~buf~0#1| 0) .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and (<= (+ |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~in~0#1| 1) (+ |ULTIMATE.start_main_~buf~0#1| |ULTIMATE.start_main_~inlen~0#1|)) .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2022-11-25 17:11:20,444 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-11-25 17:11:20,444 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-25 17:11:20,444 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-25 17:11:20,445 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-25 17:11:20,445 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-25 17:11:20,445 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-25 17:11:20,445 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-25 17:11:20,448 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 17:11:20,450 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 17:11:20,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 05:11:20 BoogieIcfgContainer [2022-11-25 17:11:20,465 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 17:11:20,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 17:11:20,466 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 17:11:20,466 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 17:11:20,466 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:11:10" (3/4) ... [2022-11-25 17:11:20,469 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-25 17:11:20,476 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-25 17:11:20,480 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-25 17:11:20,480 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-25 17:11:20,481 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-25 17:11:20,481 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-25 17:11:20,515 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/witness.graphml [2022-11-25 17:11:20,516 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 17:11:20,516 INFO L158 Benchmark]: Toolchain (without parser) took 11282.98ms. Allocated memory was 140.5MB in the beginning and 243.3MB in the end (delta: 102.8MB). Free memory was 97.3MB in the beginning and 139.9MB in the end (delta: -42.6MB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,516 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 140.5MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 17:11:20,517 INFO L158 Benchmark]: CACSL2BoogieTranslator took 258.59ms. Allocated memory is still 140.5MB. Free memory was 96.9MB in the beginning and 86.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,517 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.16ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 84.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,517 INFO L158 Benchmark]: Boogie Preprocessor took 23.52ms. Allocated memory is still 140.5MB. Free memory was 84.9MB in the beginning and 83.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,518 INFO L158 Benchmark]: RCFGBuilder took 450.91ms. Allocated memory is still 140.5MB. Free memory was 83.7MB in the beginning and 73.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,518 INFO L158 Benchmark]: TraceAbstraction took 10457.54ms. Allocated memory was 140.5MB in the beginning and 243.3MB in the end (delta: 102.8MB). Free memory was 72.4MB in the beginning and 143.0MB in the end (delta: -70.6MB). Peak memory consumption was 106.9MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,518 INFO L158 Benchmark]: Witness Printer took 50.18ms. Allocated memory is still 243.3MB. Free memory was 143.0MB in the beginning and 139.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 17:11:20,520 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 140.5MB. Free memory is still 86.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 258.59ms. Allocated memory is still 140.5MB. Free memory was 96.9MB in the beginning and 86.5MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.16ms. Allocated memory is still 140.5MB. Free memory was 86.5MB in the beginning and 84.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.52ms. Allocated memory is still 140.5MB. Free memory was 84.9MB in the beginning and 83.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.91ms. Allocated memory is still 140.5MB. Free memory was 83.7MB in the beginning and 73.1MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 10457.54ms. Allocated memory was 140.5MB in the beginning and 243.3MB in the end (delta: 102.8MB). Free memory was 72.4MB in the beginning and 143.0MB in the end (delta: -70.6MB). Peak memory consumption was 106.9MB. Max. memory is 16.1GB. * Witness Printer took 50.18ms. Allocated memory is still 243.3MB. Free memory was 143.0MB in the beginning and 139.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.3s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 477 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 437 mSDsluCounter, 1245 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 914 mSDsCounter, 487 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1715 IncrementalHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 487 mSolverCounterUnsat, 331 mSDtfsCounter, 1715 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 801 GetRequests, 639 SyntacticMatches, 17 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 941 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 105, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 57 PreInvPairs, 102 NumberOfFragments, 376 HoareAnnotationTreeSize, 57 FomulaSimplifications, 414 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2116 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 705 NumberOfCodeBlocks, 705 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 978 ConstructedInterpolants, 0 QuantifiedInterpolants, 3506 SizeOfPredicates, 20 NumberOfNonLiveVariables, 616 ConjunctsInSsa, 75 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2550/2923 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((0 < buflim + 1 && buf == 0) && bufferlen == 2 + buflim) && bufferlen < inlen) && in == 0) || (((((bufferlen + in + 1 <= buf + inlen && bufferlen == 2 + buflim) && 1 <= in) && bufferlen < inlen) && buf + 2 <= bufferlen) && 0 <= buf) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-25 17:11:20,541 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e94111d6-f187-439d-adbb-079ee7fc6d80/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE