./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 dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ --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-dbf71c6-m [2022-10-17 10:12:02,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:12:02,715 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:12:02,744 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:12:02,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:12:02,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:12:02,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:12:02,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:12:02,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:12:02,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:12:02,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:12:02,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:12:02,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:12:02,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:12:02,759 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:12:02,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:12:02,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:12:02,763 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:12:02,764 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:12:02,767 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:12:02,768 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:12:02,770 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:12:02,771 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:12:02,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:12:02,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:12:02,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:12:02,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:12:02,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:12:02,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:12:02,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:12:02,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:12:02,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:12:02,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:12:02,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:12:02,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:12:02,785 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:12:02,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:12:02,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:12:02,786 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:12:02,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:12:02,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:12:02,789 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 10:12:02,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:12:02,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:12:02,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:12:02,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:12:02,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:12:02,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:12:02,817 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:12:02,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:12:02,817 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:12:02,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:12:02,818 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:12:02,818 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:12:02,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:12:02,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:12:02,819 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 10:12:02,819 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:12:02,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 10:12:02,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:12:02,819 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 10:12:02,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:12:02,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 10:12:02,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:12:02,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:12:02,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:12:02,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:12:02,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:12:02,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:12:02,822 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 10:12:02,822 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:12:02,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:12:02,822 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 10:12:02,823 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 10:12:02,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 10:12:02,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2022-10-17 10:12:03,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:12:03,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:12:03,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:12:03,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:12:03,083 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:12:03,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-10-17 10:12:03,163 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/data/ecc1941c7/5b97f7fd19454784a48ce4e94ed0a61e/FLAG4de41eb17 [2022-10-17 10:12:03,635 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:12:03,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-10-17 10:12:03,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/data/ecc1941c7/5b97f7fd19454784a48ce4e94ed0a61e/FLAG4de41eb17 [2022-10-17 10:12:04,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/data/ecc1941c7/5b97f7fd19454784a48ce4e94ed0a61e [2022-10-17 10:12:04,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:12:04,027 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:12:04,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:12:04,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:12:04,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:12:04,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,040 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@753b64b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04, skipping insertion in model container [2022-10-17 10:12:04,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,048 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:12:04,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:12:04,242 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-10-17 10:12:04,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:12:04,266 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:12:04,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-10-17 10:12:04,285 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:12:04,298 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:12:04,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04 WrapperNode [2022-10-17 10:12:04,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:12:04,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:12:04,300 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:12:04,300 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:12:04,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,315 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,333 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-10-17 10:12:04,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:12:04,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:12:04,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:12:04,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:12:04,344 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,349 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,353 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,354 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,355 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:12:04,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:12:04,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:12:04,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:12:04,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (1/1) ... [2022-10-17 10:12:04,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:12:04,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:12:04,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:12:04,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:12:04,429 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:12:04,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:12:04,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:12:04,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:12:04,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 10:12:04,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 10:12:04,489 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:12:04,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:12:04,650 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:12:04,656 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:12:04,656 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-10-17 10:12:04,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:12:04 BoogieIcfgContainer [2022-10-17 10:12:04,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:12:04,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:12:04,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:12:04,664 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:12:04,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:12:04" (1/3) ... [2022-10-17 10:12:04,665 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c53963d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:12:04, skipping insertion in model container [2022-10-17 10:12:04,665 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:12:04" (2/3) ... [2022-10-17 10:12:04,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c53963d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:12:04, skipping insertion in model container [2022-10-17 10:12:04,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:12:04" (3/3) ... [2022-10-17 10:12:04,682 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2022-10-17 10:12:04,716 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:12:04,717 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 10:12:04,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:12:04,775 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;@24db0c26, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:12:04,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 10:12:04,780 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) [2022-10-17 10:12:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-10-17 10:12:04,790 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:04,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:12:04,791 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:04,812 INFO L85 PathProgramCache]: Analyzing trace with hash -167421905, now seen corresponding path program 1 times [2022-10-17 10:12:04,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:04,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352880660] [2022-10-17 10:12:04,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:04,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:12:04,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:04,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352880660] [2022-10-17 10:12:04,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352880660] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:04,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:04,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:12:04,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141232994] [2022-10-17 10:12:04,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:04,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 10:12:04,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:05,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 10:12:05,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 10:12:05,006 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) [2022-10-17 10:12:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:05,030 INFO L93 Difference]: Finished difference Result 56 states and 87 transitions. [2022-10-17 10:12:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 10:12:05,032 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 [2022-10-17 10:12:05,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:05,040 INFO L225 Difference]: With dead ends: 56 [2022-10-17 10:12:05,040 INFO L226 Difference]: Without dead ends: 26 [2022-10-17 10:12:05,044 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 [2022-10-17 10:12:05,048 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 [2022-10-17 10:12:05,049 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] [2022-10-17 10:12:05,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-10-17 10:12:05,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-10-17 10:12:05,086 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) [2022-10-17 10:12:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-10-17 10:12:05,089 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 11 [2022-10-17 10:12:05,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:05,089 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-10-17 10:12:05,090 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) [2022-10-17 10:12:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-10-17 10:12:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-10-17 10:12:05,091 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:05,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:12:05,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:12:05,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1482831489, now seen corresponding path program 1 times [2022-10-17 10:12:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:05,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537017519] [2022-10-17 10:12:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:12:05,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:05,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537017519] [2022-10-17 10:12:05,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537017519] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:05,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:05,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:12:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128515785] [2022-10-17 10:12:05,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:05,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:12:05,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:05,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:12:05,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:12:05,321 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) [2022-10-17 10:12:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:05,425 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2022-10-17 10:12:05,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:12:05,426 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 [2022-10-17 10:12:05,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:05,427 INFO L225 Difference]: With dead ends: 32 [2022-10-17 10:12:05,427 INFO L226 Difference]: Without dead ends: 30 [2022-10-17 10:12:05,428 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 [2022-10-17 10:12:05,430 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 [2022-10-17 10:12:05,431 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] [2022-10-17 10:12:05,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-10-17 10:12:05,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-10-17 10:12:05,445 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) [2022-10-17 10:12:05,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-10-17 10:12:05,447 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 12 [2022-10-17 10:12:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:05,447 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-10-17 10:12:05,448 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) [2022-10-17 10:12:05,448 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-10-17 10:12:05,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-10-17 10:12:05,449 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:05,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:12:05,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:12:05,450 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:05,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:05,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2126947644, now seen corresponding path program 1 times [2022-10-17 10:12:05,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:05,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852491795] [2022-10-17 10:12:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:05,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:05,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:12:05,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:12:05,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:05,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852491795] [2022-10-17 10:12:05,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852491795] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:05,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:05,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:12:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750435220] [2022-10-17 10:12:05,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:12:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:05,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:12:05,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:12:05,685 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) [2022-10-17 10:12:05,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:05,825 INFO L93 Difference]: Finished difference Result 45 states and 57 transitions. [2022-10-17 10:12:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:12:05,825 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 [2022-10-17 10:12:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:05,827 INFO L225 Difference]: With dead ends: 45 [2022-10-17 10:12:05,827 INFO L226 Difference]: Without dead ends: 43 [2022-10-17 10:12:05,828 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 [2022-10-17 10:12:05,829 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:05,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 97 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:12:05,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-10-17 10:12:05,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2022-10-17 10:12:05,842 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) [2022-10-17 10:12:05,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions. [2022-10-17 10:12:05,844 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 17 [2022-10-17 10:12:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:05,845 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 53 transitions. [2022-10-17 10:12:05,845 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) [2022-10-17 10:12:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions. [2022-10-17 10:12:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-10-17 10:12:05,847 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:05,847 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] [2022-10-17 10:12:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:12:05,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -2018842485, now seen corresponding path program 1 times [2022-10-17 10:12:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:05,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671581382] [2022-10-17 10:12:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:06,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,025 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:12:06,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:06,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671581382] [2022-10-17 10:12:06,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671581382] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:06,026 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:06,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:12:06,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92372848] [2022-10-17 10:12:06,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:06,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:12:06,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:06,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:12:06,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:12:06,036 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) [2022-10-17 10:12:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:06,186 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-10-17 10:12:06,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:12:06,187 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 [2022-10-17 10:12:06,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:06,189 INFO L225 Difference]: With dead ends: 52 [2022-10-17 10:12:06,194 INFO L226 Difference]: Without dead ends: 50 [2022-10-17 10:12:06,195 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 [2022-10-17 10:12:06,197 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 [2022-10-17 10:12:06,200 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] [2022-10-17 10:12:06,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-10-17 10:12:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-10-17 10:12:06,230 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) [2022-10-17 10:12:06,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-10-17 10:12:06,232 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 25 [2022-10-17 10:12:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:06,232 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-10-17 10:12:06,232 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) [2022-10-17 10:12:06,233 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-10-17 10:12:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:12:06,234 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:06,234 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] [2022-10-17 10:12:06,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:12:06,235 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:06,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:06,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488141, now seen corresponding path program 1 times [2022-10-17 10:12:06,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:06,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589444102] [2022-10-17 10:12:06,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:06,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-10-17 10:12:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:12:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-10-17 10:12:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:12:06,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:06,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589444102] [2022-10-17 10:12:06,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589444102] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:06,413 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:06,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:12:06,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520447960] [2022-10-17 10:12:06,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:06,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:12:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:06,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:12:06,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:12:06,420 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) [2022-10-17 10:12:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:06,623 INFO L93 Difference]: Finished difference Result 71 states and 89 transitions. [2022-10-17 10:12:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:12:06,624 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 [2022-10-17 10:12:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:06,631 INFO L225 Difference]: With dead ends: 71 [2022-10-17 10:12:06,632 INFO L226 Difference]: Without dead ends: 64 [2022-10-17 10:12:06,633 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 [2022-10-17 10:12:06,637 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:06,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 99 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:12:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-17 10:12:06,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2022-10-17 10:12:06,658 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) [2022-10-17 10:12:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-10-17 10:12:06,669 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 28 [2022-10-17 10:12:06,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:06,670 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-10-17 10:12:06,670 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) [2022-10-17 10:12:06,670 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-10-17 10:12:06,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:12:06,671 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:06,671 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] [2022-10-17 10:12:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:12:06,672 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:06,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1722491344, now seen corresponding path program 1 times [2022-10-17 10:12:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:06,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573309931] [2022-10-17 10:12:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:06,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:12:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 10:12:06,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:06,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573309931] [2022-10-17 10:12:06,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573309931] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:12:06,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:12:06,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 10:12:06,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370244676] [2022-10-17 10:12:06,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:12:06,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:12:06,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:06,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:12:06,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:12:06,879 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) [2022-10-17 10:12:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:07,042 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-10-17 10:12:07,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-10-17 10:12:07,043 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 [2022-10-17 10:12:07,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:07,047 INFO L225 Difference]: With dead ends: 73 [2022-10-17 10:12:07,047 INFO L226 Difference]: Without dead ends: 71 [2022-10-17 10:12:07,048 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 [2022-10-17 10:12:07,053 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:07,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 146 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:12:07,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-10-17 10:12:07,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-10-17 10:12:07,088 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) [2022-10-17 10:12:07,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2022-10-17 10:12:07,090 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 30 [2022-10-17 10:12:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:07,091 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2022-10-17 10:12:07,091 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) [2022-10-17 10:12:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2022-10-17 10:12:07,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-10-17 10:12:07,097 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:07,098 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] [2022-10-17 10:12:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 10:12:07,099 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:07,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:07,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1030091550, now seen corresponding path program 1 times [2022-10-17 10:12:07,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065532192] [2022-10-17 10:12:07,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:07,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:12:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:12:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-10-17 10:12:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-10-17 10:12:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-10-17 10:12:07,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,491 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065532192] [2022-10-17 10:12:07,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065532192] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:12:07,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889834459] [2022-10-17 10:12:07,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:07,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:12:07,506 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:12:07,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:12:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:07,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2022-10-17 10:12:07,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:12:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:07,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:12:08,121 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:08,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889834459] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:12:08,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:12:08,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-10-17 10:12:08,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879694784] [2022-10-17 10:12:08,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:12:08,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-10-17 10:12:08,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:08,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-10-17 10:12:08,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-10-17 10:12:08,127 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-17 10:12:08,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:08,744 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2022-10-17 10:12:08,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-10-17 10:12:08,745 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 53 [2022-10-17 10:12:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:08,750 INFO L225 Difference]: With dead ends: 111 [2022-10-17 10:12:08,750 INFO L226 Difference]: Without dead ends: 96 [2022-10-17 10:12:08,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2022-10-17 10:12:08,753 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 72 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:08,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 238 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:12:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-10-17 10:12:08,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-10-17 10:12:08,789 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) [2022-10-17 10:12:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-10-17 10:12:08,791 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 53 [2022-10-17 10:12:08,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:08,792 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-10-17 10:12:08,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-17 10:12:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-10-17 10:12:08,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-10-17 10:12:08,794 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:08,794 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] [2022-10-17 10:12:08,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:12:09,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:09,021 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:09,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:09,021 INFO L85 PathProgramCache]: Analyzing trace with hash 302113055, now seen corresponding path program 1 times [2022-10-17 10:12:09,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:09,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453580701] [2022-10-17 10:12:09,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:09,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:09,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:12:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:12:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-10-17 10:12:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:12:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-10-17 10:12:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,195 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:09,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453580701] [2022-10-17 10:12:09,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453580701] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:12:09,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084767606] [2022-10-17 10:12:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:09,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:09,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:12:09,197 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:12:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:12:09,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 10:12:09,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:12:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:09,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:12:09,557 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-10-17 10:12:09,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084767606] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:12:09,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:12:09,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-10-17 10:12:09,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070038732] [2022-10-17 10:12:09,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:12:09,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 10:12:09,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:09,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 10:12:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-10-17 10:12:09,560 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-17 10:12:09,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:09,740 INFO L93 Difference]: Finished difference Result 94 states and 112 transitions. [2022-10-17 10:12:09,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:12:09,740 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 55 [2022-10-17 10:12:09,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:09,744 INFO L225 Difference]: With dead ends: 94 [2022-10-17 10:12:09,744 INFO L226 Difference]: Without dead ends: 92 [2022-10-17 10:12:09,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2022-10-17 10:12:09,746 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 76 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 189 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:12:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-10-17 10:12:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-10-17 10:12:09,776 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) [2022-10-17 10:12:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2022-10-17 10:12:09,780 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 55 [2022-10-17 10:12:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:09,781 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2022-10-17 10:12:09,781 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-10-17 10:12:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2022-10-17 10:12:09,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-10-17 10:12:09,790 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:09,791 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] [2022-10-17 10:12:09,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:12:10,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:12:10,013 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:10,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:10,013 INFO L85 PathProgramCache]: Analyzing trace with hash 847231248, now seen corresponding path program 2 times [2022-10-17 10:12:10,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:10,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594809173] [2022-10-17 10:12:10,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:10,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:12:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:12:10,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-10-17 10:12:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:12:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-10-17 10:12:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:12:10,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 10:12:10,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:12:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 10:12:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 48 proven. 24 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-10-17 10:12:10,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594809173] [2022-10-17 10:12:10,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594809173] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:12:10,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393221786] [2022-10-17 10:12:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:12:10,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:12:10,353 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:12:10,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:12:10,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:12:10,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:12:10,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:12:10,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:12:10,725 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 10:12:10,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:12:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-10-17 10:12:10,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393221786] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:12:10,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:12:10,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-10-17 10:12:10,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990008150] [2022-10-17 10:12:10,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:12:10,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-10-17 10:12:10,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:10,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-10-17 10:12:10,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-10-17 10:12:10,996 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 25 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2022-10-17 10:12:11,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:11,883 INFO L93 Difference]: Finished difference Result 109 states and 131 transitions. [2022-10-17 10:12:11,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-10-17 10:12:11,884 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 80 [2022-10-17 10:12:11,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:11,886 INFO L225 Difference]: With dead ends: 109 [2022-10-17 10:12:11,886 INFO L226 Difference]: Without dead ends: 107 [2022-10-17 10:12:11,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=1514, Unknown=0, NotChecked=0, Total=1892 [2022-10-17 10:12:11,888 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:11,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 127 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 10:12:11,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-10-17 10:12:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-10-17 10:12:11,906 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) [2022-10-17 10:12:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2022-10-17 10:12:11,907 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 80 [2022-10-17 10:12:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:11,908 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2022-10-17 10:12:11,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2022-10-17 10:12:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2022-10-17 10:12:11,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-10-17 10:12:11,910 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:12:11,910 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] [2022-10-17 10:12:11,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:12:12,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:12,141 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 10:12:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:12:12,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1329001986, now seen corresponding path program 2 times [2022-10-17 10:12:12,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:12:12,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713516263] [2022-10-17 10:12:12,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:12:12,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:12:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-10-17 10:12:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-10-17 10:12:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-10-17 10:12:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-10-17 10:12:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-10-17 10:12:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-10-17 10:12:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-10-17 10:12:12,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-10-17 10:12:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-10-17 10:12:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-10-17 10:12:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-10-17 10:12:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-10-17 10:12:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-10-17 10:12:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-10-17 10:12:12,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-10-17 10:12:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:12:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 31 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-10-17 10:12:12,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:12:12,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713516263] [2022-10-17 10:12:12,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713516263] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:12:12,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233645434] [2022-10-17 10:12:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-10-17 10:12:12,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:12:12,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:12:12,554 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:12:12,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:12:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-10-17 10:12:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 10:12:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 14 conjunts are in the unsatisfiable core [2022-10-17 10:12:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:12:12,854 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-10-17 10:12:12,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:12:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 68 proven. 22 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2022-10-17 10:12:13,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233645434] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:12:13,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:12:13,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2022-10-17 10:12:13,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438233290] [2022-10-17 10:12:13,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:12:13,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-10-17 10:12:13,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:12:13,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-10-17 10:12:13,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:12:13,113 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-10-17 10:12:13,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:12:13,460 INFO L93 Difference]: Finished difference Result 96 states and 113 transitions. [2022-10-17 10:12:13,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-10-17 10:12:13,461 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 103 [2022-10-17 10:12:13,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:12:13,461 INFO L225 Difference]: With dead ends: 96 [2022-10-17 10:12:13,462 INFO L226 Difference]: Without dead ends: 0 [2022-10-17 10:12:13,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 227 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2022-10-17 10:12:13,464 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:12:13,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:12:13,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-10-17 10:12:13,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-10-17 10:12:13,465 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) [2022-10-17 10:12:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-10-17 10:12:13,465 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2022-10-17 10:12:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:12:13,466 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-10-17 10:12:13,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-10-17 10:12:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-10-17 10:12:13,466 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-10-17 10:12:13,469 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-10-17 10:12:13,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:12:13,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:12:13,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-10-17 10:12:14,541 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-10-17 10:12:14,541 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2022-10-17 10:12:14,542 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|)) [2022-10-17 10:12:14,542 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|)) [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point L44(lines 44 45) no Hoare annotation was computed. [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-10-17 10:12:14,542 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-10-17 10:12:14,543 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 (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2) (let ((.cse3 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (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|)) (<= .cse3 |ULTIMATE.start_main_~bufferlen~0#1|) .cse0 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse3) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-10-17 10:12:14,543 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (+ 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 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .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) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-10-17 10:12:14,543 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (+ 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 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .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) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-10-17 10:12:14,543 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2022-10-17 10:12:14,544 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 (<= 3 |ULTIMATE.start_main_~inlen~0#1|) .cse0 .cse1 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse2) (let ((.cse3 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (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|)) (<= .cse3 |ULTIMATE.start_main_~bufferlen~0#1|) .cse0 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse3) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) .cse1 .cse2)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-10-17 10:12:14,544 INFO L899 garLoopResultBuilder]: For program point L33(line 33) no Hoare annotation was computed. [2022-10-17 10:12:14,544 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-10-17 10:12:14,544 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-10-17 10:12:14,544 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (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 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (< |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|))) [2022-10-17 10:12:14,544 INFO L895 garLoopResultBuilder]: At program point L46-1(line 46) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (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 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (< |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|))) [2022-10-17 10:12:14,544 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-10-17 10:12:14,544 INFO L902 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2022-10-17 10:12:14,545 INFO L902 garLoopResultBuilder]: At program point L55-1(lines 24 56) the Hoare annotation is: true [2022-10-17 10:12:14,545 INFO L895 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (+ 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) (= |ULTIMATE.start_main_~bufferlen~0#1| .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 |ULTIMATE.start_main_~bufferlen~0#1|) (<= 1 |ULTIMATE.start_main_~in~0#1|) (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse1 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2022-10-17 10:12:14,545 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-10-17 10:12:14,545 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-10-17 10:12:14,545 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-10-17 10:12:14,545 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-10-17 10:12:14,545 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-10-17 10:12:14,546 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-10-17 10:12:14,546 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-10-17 10:12:14,550 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-10-17 10:12:14,554 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-10-17 10:12:14,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.10 10:12:14 BoogieIcfgContainer [2022-10-17 10:12:14,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-10-17 10:12:14,577 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-10-17 10:12:14,577 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-10-17 10:12:14,577 INFO L275 PluginConnector]: Witness Printer initialized [2022-10-17 10:12:14,578 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:12:04" (3/4) ... [2022-10-17 10:12:14,581 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-10-17 10:12:14,589 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-10-17 10:12:14,595 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-10-17 10:12:14,596 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-10-17 10:12:14,596 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-10-17 10:12:14,596 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-10-17 10:12:14,657 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/witness.graphml [2022-10-17 10:12:14,657 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-10-17 10:12:14,659 INFO L158 Benchmark]: Toolchain (without parser) took 10631.35ms. Allocated memory was 98.6MB in the beginning and 180.4MB in the end (delta: 81.8MB). Free memory was 66.2MB in the beginning and 60.0MB in the end (delta: 6.2MB). Peak memory consumption was 89.0MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,659 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 98.6MB. Free memory was 69.4MB in the beginning and 69.4MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-10-17 10:12:14,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.00ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.5MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,660 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.85ms. Allocated memory is still 98.6MB. Free memory was 75.5MB in the beginning and 73.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,661 INFO L158 Benchmark]: Boogie Preprocessor took 22.97ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,661 INFO L158 Benchmark]: RCFGBuilder took 299.91ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,662 INFO L158 Benchmark]: TraceAbstraction took 9915.83ms. Allocated memory was 98.6MB in the beginning and 180.4MB in the end (delta: 81.8MB). Free memory was 61.6MB in the beginning and 63.2MB in the end (delta: -1.5MB). Peak memory consumption was 81.2MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,662 INFO L158 Benchmark]: Witness Printer took 80.49ms. Allocated memory is still 180.4MB. Free memory was 63.2MB in the beginning and 60.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-10-17 10:12:14,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 98.6MB. Free memory was 69.4MB in the beginning and 69.4MB in the end (delta: 30.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.00ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.5MB in the end (delta: -9.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.85ms. Allocated memory is still 98.6MB. Free memory was 75.5MB in the beginning and 73.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.97ms. Allocated memory is still 98.6MB. Free memory was 73.8MB in the beginning and 72.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 299.91ms. Allocated memory is still 98.6MB. Free memory was 72.6MB in the beginning and 62.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9915.83ms. Allocated memory was 98.6MB in the beginning and 180.4MB in the end (delta: 81.8MB). Free memory was 61.6MB in the beginning and 63.2MB in the end (delta: -1.5MB). Peak memory consumption was 81.2MB. Max. memory is 16.1GB. * Witness Printer took 80.49ms. Allocated memory is still 180.4MB. Free memory was 63.2MB in the beginning and 60.0MB 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: 9.8s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 428 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 388 mSDsluCounter, 1359 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1002 mSDsCounter, 461 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1701 IncrementalHoareTripleChecker+Invalid, 2162 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 461 mSolverCounterUnsat, 357 mSDtfsCounter, 1701 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 801 GetRequests, 639 SyntacticMatches, 24 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 104, 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, 33 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 57 PreInvPairs, 102 NumberOfFragments, 405 HoareAnnotationTreeSize, 57 FomulaSimplifications, 392 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 2199 FormulaSimplificationTreeSizeReductionInter, 0.7s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 705 NumberOfCodeBlocks, 705 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 978 ConstructedInterpolants, 0 QuantifiedInterpolants, 3464 SizeOfPredicates, 16 NumberOfNonLiveVariables, 616 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2737/2923 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 && 2 + buflim <= bufferlen) && 1 <= in) && bufferlen <= 2 + buflim) && bufferlen < inlen) && buf + 2 <= bufferlen) && 0 <= buf) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-10-17 10:12:14,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_354d6263-d707-40e5-85ca-7f99a7c99bff/bin/uautomizer-J5u9QxTXDZ/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