./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS --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 Taipan --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-8393723 [2022-11-19 06:59:15,998 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:59:16,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:59:16,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:59:16,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:59:16,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:59:16,026 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:59:16,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:59:16,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:59:16,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:59:16,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:59:16,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:59:16,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:59:16,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:59:16,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:59:16,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:59:16,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:59:16,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:59:16,041 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:59:16,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:59:16,044 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:59:16,055 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:59:16,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:59:16,057 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:59:16,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:59:16,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:59:16,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:59:16,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:59:16,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:59:16,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:59:16,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:59:16,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:59:16,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:59:16,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:59:16,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:59:16,078 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:59:16,079 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:59:16,079 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:59:16,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:59:16,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:59:16,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:59:16,082 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:59:16,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:59:16,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:59:16,125 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:59:16,125 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:59:16,126 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:59:16,127 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:59:16,127 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:59:16,127 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:59:16,128 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:59:16,128 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:59:16,129 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:59:16,130 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:59:16,130 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:59:16,130 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:59:16,130 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:59:16,131 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:59:16,131 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:59:16,131 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:59:16,132 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:59:16,132 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:59:16,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:59:16,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:59:16,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:59:16,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:59:16,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:59:16,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:59:16,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:59:16,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:59:16,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:59:16,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:59:16,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:59:16,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:59:16,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:59:16,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:59:16,136 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:59:16,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:59:16,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:59:16,137 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:59:16,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:59:16,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:59:16,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:59:16,138 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_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2022-11-19 06:59:16,406 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:59:16,435 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:59:16,439 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:59:16,441 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:59:16,443 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:59:16,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-19 06:59:16,519 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/data/e7a2b0802/4683ecc4ef3f403caba62b0872495be4/FLAG6b9d90231 [2022-11-19 06:59:16,972 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:59:16,973 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2022-11-19 06:59:16,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/data/e7a2b0802/4683ecc4ef3f403caba62b0872495be4/FLAG6b9d90231 [2022-11-19 06:59:17,346 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/data/e7a2b0802/4683ecc4ef3f403caba62b0872495be4 [2022-11-19 06:59:17,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:59:17,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:59:17,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:59:17,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:59:17,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:59:17,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b22dfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17, skipping insertion in model container [2022-11-19 06:59:17,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,369 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:59:17,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:59:17,590 WARN L234 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_9cc7b47a-9026-4142-9f95-005ccde191df/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-19 06:59:17,604 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:59:17,613 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:59:17,625 WARN L234 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_9cc7b47a-9026-4142-9f95-005ccde191df/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2022-11-19 06:59:17,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:59:17,642 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:59:17,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17 WrapperNode [2022-11-19 06:59:17,642 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:59:17,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:59:17,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:59:17,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:59:17,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,680 INFO L138 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2022-11-19 06:59:17,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:59:17,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:59:17,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:59:17,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:59:17,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:59:17,706 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:59:17,706 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:59:17,706 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:59:17,707 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (1/1) ... [2022-11-19 06:59:17,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:59:17,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:17,748 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:59:17,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:59:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:59:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:59:17,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:59:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:59:17,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-19 06:59:17,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-19 06:59:17,872 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:59:17,874 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:59:18,090 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:59:18,114 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:59:18,114 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-19 06:59:18,118 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:18 BoogieIcfgContainer [2022-11-19 06:59:18,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:59:18,120 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:59:18,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:59:18,125 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:59:18,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:59:17" (1/3) ... [2022-11-19 06:59:18,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570f496b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:18, skipping insertion in model container [2022-11-19 06:59:18,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:59:17" (2/3) ... [2022-11-19 06:59:18,127 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@570f496b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:59:18, skipping insertion in model container [2022-11-19 06:59:18,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:18" (3/3) ... [2022-11-19 06:59:18,129 INFO L112 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2022-11-19 06:59:18,152 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:59:18,153 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:59:18,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:59:18,219 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=FINITE_AUTOMATA, 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;@314dfa2d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:59:18,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:59:18,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 06:59:18,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-19 06:59:18,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:18,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:18,234 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:18,240 INFO L85 PathProgramCache]: Analyzing trace with hash -802314430, now seen corresponding path program 1 times [2022-11-19 06:59:18,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:18,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459425261] [2022-11-19 06:59:18,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:18,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:18,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:18,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459425261] [2022-11-19 06:59:18,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459425261] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:18,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:18,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:59:18,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655648122] [2022-11-19 06:59:18,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:18,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 06:59:18,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 06:59:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:59:18,479 INFO L87 Difference]: Start difference. First operand has 26 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 17 states have internal predecessors, (23), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:18,522 INFO L93 Difference]: Finished difference Result 48 states and 79 transitions. [2022-11-19 06:59:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 06:59:18,525 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2022-11-19 06:59:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:18,534 INFO L225 Difference]: With dead ends: 48 [2022-11-19 06:59:18,535 INFO L226 Difference]: Without dead ends: 23 [2022-11-19 06:59:18,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 06:59:18,543 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:18,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:59:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-19 06:59:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-19 06:59:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:59:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2022-11-19 06:59:18,600 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 9 [2022-11-19 06:59:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:18,601 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2022-11-19 06:59:18,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2022-11-19 06:59:18,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 06:59:18,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:18,604 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:18,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:59:18,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:18,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:18,606 INFO L85 PathProgramCache]: Analyzing trace with hash 310336716, now seen corresponding path program 1 times [2022-11-19 06:59:18,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:18,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053040971] [2022-11-19 06:59:18,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:18,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:18,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:18,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053040971] [2022-11-19 06:59:18,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053040971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:18,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:18,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:59:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185912986] [2022-11-19 06:59:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:18,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:59:18,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:18,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:59:18,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:59:18,840 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:19,008 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-19 06:59:19,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:59:19,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2022-11-19 06:59:19,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:19,010 INFO L225 Difference]: With dead ends: 29 [2022-11-19 06:59:19,010 INFO L226 Difference]: Without dead ends: 27 [2022-11-19 06:59:19,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:19,012 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:19,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 52 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:19,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-19 06:59:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-19 06:59:19,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 06:59:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2022-11-19 06:59:19,026 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2022-11-19 06:59:19,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:19,027 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2022-11-19 06:59:19,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2022-11-19 06:59:19,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-19 06:59:19,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:19,029 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:19,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:59:19,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash 340662799, now seen corresponding path program 1 times [2022-11-19 06:59:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:19,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62318256] [2022-11-19 06:59:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:19,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:59:19,263 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:19,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62318256] [2022-11-19 06:59:19,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62318256] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:19,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:19,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:59:19,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651235347] [2022-11-19 06:59:19,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:19,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:59:19,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:19,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:59:19,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:19,268 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:59:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:19,402 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2022-11-19 06:59:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:59:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 15 [2022-11-19 06:59:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:19,405 INFO L225 Difference]: With dead ends: 42 [2022-11-19 06:59:19,405 INFO L226 Difference]: Without dead ends: 40 [2022-11-19 06:59:19,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-19 06:59:19,407 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:19,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 85 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:19,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-19 06:59:19,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-11-19 06:59:19,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 25 states have internal predecessors, (27), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 06:59:19,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2022-11-19 06:59:19,422 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 15 [2022-11-19 06:59:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:19,422 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2022-11-19 06:59:19,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 06:59:19,423 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2022-11-19 06:59:19,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 06:59:19,424 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:19,424 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:19,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:59:19,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:19,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1687915168, now seen corresponding path program 1 times [2022-11-19 06:59:19,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:19,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54790863] [2022-11-19 06:59:19,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:19,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 06:59:19,605 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:19,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54790863] [2022-11-19 06:59:19,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54790863] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:19,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:19,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 06:59:19,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976264434] [2022-11-19 06:59:19,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 06:59:19,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 06:59:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:59:19,608 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:59:19,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:19,724 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-11-19 06:59:19,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:59:19,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 22 [2022-11-19 06:59:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:19,726 INFO L225 Difference]: With dead ends: 48 [2022-11-19 06:59:19,727 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 06:59:19,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:59:19,729 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:19,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 164 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 06:59:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2022-11-19 06:59:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.2) internal successors, (30), 28 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-19 06:59:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2022-11-19 06:59:19,742 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2022-11-19 06:59:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:19,742 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2022-11-19 06:59:19,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 06:59:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2022-11-19 06:59:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-19 06:59:19,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:19,744 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:19,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:59:19,745 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:19,746 INFO L85 PathProgramCache]: Analyzing trace with hash -194088064, now seen corresponding path program 1 times [2022-11-19 06:59:19,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:19,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770440366] [2022-11-19 06:59:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:19,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:19,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:19,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770440366] [2022-11-19 06:59:19,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770440366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:19,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:19,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:59:19,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84731008] [2022-11-19 06:59:19,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:19,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:59:19,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:19,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:59:19,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:59:19,864 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:59:20,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:20,087 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2022-11-19 06:59:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:59:20,088 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 26 [2022-11-19 06:59:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:20,093 INFO L225 Difference]: With dead ends: 67 [2022-11-19 06:59:20,094 INFO L226 Difference]: Without dead ends: 60 [2022-11-19 06:59:20,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 06:59:20,104 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:20,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 92 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:20,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-19 06:59:20,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2022-11-19 06:59:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 38 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 06:59:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2022-11-19 06:59:20,126 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2022-11-19 06:59:20,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:20,127 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2022-11-19 06:59:20,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:59:20,128 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2022-11-19 06:59:20,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 06:59:20,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:20,129 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] [2022-11-19 06:59:20,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:59:20,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:20,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:20,131 INFO L85 PathProgramCache]: Analyzing trace with hash -414236357, now seen corresponding path program 1 times [2022-11-19 06:59:20,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:20,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362802048] [2022-11-19 06:59:20,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:20,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:59:20,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362802048] [2022-11-19 06:59:20,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362802048] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:59:20,302 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:59:20,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 06:59:20,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944947609] [2022-11-19 06:59:20,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:59:20,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:59:20,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:20,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:59:20,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:59:20,304 INFO L87 Difference]: Start difference. First operand 58 states and 71 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:59:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:20,453 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2022-11-19 06:59:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 06:59:20,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 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 27 [2022-11-19 06:59:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:20,454 INFO L225 Difference]: With dead ends: 68 [2022-11-19 06:59:20,454 INFO L226 Difference]: Without dead ends: 66 [2022-11-19 06:59:20,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-19 06:59:20,456 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 32 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:20,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 129 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-19 06:59:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-11-19 06:59:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.131578947368421) internal successors, (43), 41 states have internal predecessors, (43), 16 states have call successors, (16), 7 states have call predecessors, (16), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 06:59:20,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-11-19 06:59:20,470 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2022-11-19 06:59:20,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:20,470 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-11-19 06:59:20,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:59:20,471 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-11-19 06:59:20,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-19 06:59:20,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:20,472 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] [2022-11-19 06:59:20,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:59:20,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:20,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash -911118985, now seen corresponding path program 1 times [2022-11-19 06:59:20,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:20,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588094121] [2022-11-19 06:59:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:20,835 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 06:59:20,836 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588094121] [2022-11-19 06:59:20,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588094121] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:20,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106537810] [2022-11-19 06:59:20,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:20,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:20,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:20,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:59:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 06:59:20,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 06:59:21,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:21,610 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-19 06:59:21,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106537810] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:21,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [711060342] [2022-11-19 06:59:21,633 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 06:59:21,633 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:21,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:21,644 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:21,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:25,287 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:59:25,292 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:26,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1179#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:26,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:26,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:26,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 19 [2022-11-19 06:59:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377690084] [2022-11-19 06:59:26,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:26,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-19 06:59:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-19 06:59:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-11-19 06:59:26,721 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 06:59:27,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:27,501 INFO L93 Difference]: Finished difference Result 102 states and 137 transitions. [2022-11-19 06:59:27,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-19 06:59:27,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 50 [2022-11-19 06:59:27,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:27,505 INFO L225 Difference]: With dead ends: 102 [2022-11-19 06:59:27,505 INFO L226 Difference]: Without dead ends: 87 [2022-11-19 06:59:27,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 11 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=244, Invalid=1562, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 06:59:27,508 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:27,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 118 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:59:27,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-19 06:59:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-11-19 06:59:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 52 states have internal predecessors, (54), 24 states have call successors, (24), 8 states have call predecessors, (24), 8 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 06:59:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2022-11-19 06:59:27,537 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 50 [2022-11-19 06:59:27,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:27,538 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2022-11-19 06:59:27,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.3125) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-19 06:59:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2022-11-19 06:59:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-19 06:59:27,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:27,545 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:27,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:27,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:59:27,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:27,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:27,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1167358428, now seen corresponding path program 1 times [2022-11-19 06:59:27,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:27,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729857326] [2022-11-19 06:59:27,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:27,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 06:59:27,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729857326] [2022-11-19 06:59:27,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729857326] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:27,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923872521] [2022-11-19 06:59:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:27,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:27,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:27,933 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:27,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:59:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-19 06:59:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 06:59:28,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-19 06:59:28,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923872521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:28,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [454186060] [2022-11-19 06:59:28,250 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 06:59:28,250 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:28,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:28,251 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:28,251 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:30,700 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:59:30,704 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:31,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1799#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:31,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:31,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:31,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-19 06:59:31,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218470155] [2022-11-19 06:59:31,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:31,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:59:31,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:59:31,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-11-19 06:59:31,634 INFO L87 Difference]: Start difference. First operand 82 states and 101 transitions. Second operand has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-19 06:59:31,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:31,791 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-19 06:59:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:59:31,792 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 51 [2022-11-19 06:59:31,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:31,793 INFO L225 Difference]: With dead ends: 88 [2022-11-19 06:59:31,793 INFO L226 Difference]: Without dead ends: 86 [2022-11-19 06:59:31,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 125 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-19 06:59:31,795 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:31,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 176 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:59:31,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-19 06:59:31,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-11-19 06:59:31,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 55 states have internal predecessors, (57), 24 states have call successors, (24), 9 states have call predecessors, (24), 9 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 06:59:31,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-11-19 06:59:31,814 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 51 [2022-11-19 06:59:31,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:31,818 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-11-19 06:59:31,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-11-19 06:59:31,819 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-11-19 06:59:31,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-11-19 06:59:31,820 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:31,821 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:31,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:32,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:32,022 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash 502390797, now seen corresponding path program 2 times [2022-11-19 06:59:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:32,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614264918] [2022-11-19 06:59:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 06:59:32,308 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614264918] [2022-11-19 06:59:32,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614264918] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:32,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642505883] [2022-11-19 06:59:32,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:59:32,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:32,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:32,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:32,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:59:32,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-19 06:59:32,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:32,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-19 06:59:32,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 06:59:32,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:33,155 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 06:59:33,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642505883] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:33,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1636670961] [2022-11-19 06:59:33,158 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-19 06:59:33,159 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:33,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:33,159 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:33,160 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:34,650 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2022-11-19 06:59:34,710 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:36,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2537#(and (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:36,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:36,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:36,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 11] total 24 [2022-11-19 06:59:36,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877677879] [2022-11-19 06:59:36,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:36,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 06:59:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 06:59:36,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1089, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 06:59:36,103 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 24 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-19 06:59:36,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:36,743 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2022-11-19 06:59:36,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-19 06:59:36,744 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) Word has length 75 [2022-11-19 06:59:36,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:36,745 INFO L225 Difference]: With dead ends: 104 [2022-11-19 06:59:36,745 INFO L226 Difference]: Without dead ends: 102 [2022-11-19 06:59:36,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 192 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2022-11-19 06:59:36,747 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 105 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:36,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 116 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 06:59:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-19 06:59:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-11-19 06:59:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 64 states have internal predecessors, (66), 24 states have call successors, (24), 12 states have call predecessors, (24), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-19 06:59:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 113 transitions. [2022-11-19 06:59:36,762 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 113 transitions. Word has length 75 [2022-11-19 06:59:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:36,763 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 113 transitions. [2022-11-19 06:59:36,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2022-11-19 06:59:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 113 transitions. [2022-11-19 06:59:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-19 06:59:36,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:59:36,765 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 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] [2022-11-19 06:59:36,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:36,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:36,971 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:59:36,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:59:36,972 INFO L85 PathProgramCache]: Analyzing trace with hash -331070875, now seen corresponding path program 2 times [2022-11-19 06:59:36,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:59:36,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076764504] [2022-11-19 06:59:36,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:59:36,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:59:37,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:59:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 68 proven. 28 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2022-11-19 06:59:37,327 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:59:37,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076764504] [2022-11-19 06:59:37,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076764504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:59:37,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14556854] [2022-11-19 06:59:37,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:59:37,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:59:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:59:37,329 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:59:37,356 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:59:37,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-19 06:59:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:59:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-19 06:59:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:59:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 97 proven. 27 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2022-11-19 06:59:37,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:59:37,862 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2022-11-19 06:59:37,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14556854] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:59:37,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1445807317] [2022-11-19 06:59:37,865 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-19 06:59:37,865 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:59:37,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:59:37,866 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:59:37,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:59:39,636 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-19 06:59:39,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:59:41,195 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3447#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 06:59:41,195 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:59:41,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:59:41,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 14 [2022-11-19 06:59:41,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688097474] [2022-11-19 06:59:41,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:59:41,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 06:59:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:59:41,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 06:59:41,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-11-19 06:59:41,197 INFO L87 Difference]: Start difference. First operand 98 states and 113 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 06:59:41,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:59:41,599 INFO L93 Difference]: Finished difference Result 98 states and 113 transitions. [2022-11-19 06:59:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 06:59:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) Word has length 98 [2022-11-19 06:59:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:59:41,601 INFO L225 Difference]: With dead ends: 98 [2022-11-19 06:59:41,601 INFO L226 Difference]: Without dead ends: 0 [2022-11-19 06:59:41,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=173, Invalid=1233, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 06:59:41,603 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 19 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:59:41,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 142 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:59:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-19 06:59:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-19 06:59:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:59:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-19 06:59:41,604 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2022-11-19 06:59:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:59:41,604 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-19 06:59:41,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 5 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-19 06:59:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-19 06:59:41,605 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-19 06:59:41,607 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 06:59:41,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:59:41,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:59:41,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-19 06:59:42,443 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2022-11-19 06:59:42,443 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2022-11-19 06:59:42,443 INFO L895 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-19 06:59:42,443 INFO L895 garLoopResultBuilder]: At program point L52-1(line 52) the Hoare annotation is: (and (let ((.cse0 (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse1 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (and .cse0 .cse1 (= |ULTIMATE.start_main_~in~0#1| 0)) (and .cse0 (<= 1 |ULTIMATE.start_main_~in~0#1|) .cse1))) (<= (+ |ULTIMATE.start_main_~buf~0#1| 1) |ULTIMATE.start_main_~bufferlen~0#1|)) [2022-11-19 06:59:42,443 INFO L899 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2022-11-19 06:59:42,444 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-19 06:59:42,444 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-11-19 06:59:42,444 INFO L895 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse1 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse2 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse3 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (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|) .cse1 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse2 .cse3)) (and .cse1 .cse2 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse3 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-19 06:59:42,444 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~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) (<= 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) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-19 06:59:42,444 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~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) (<= 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) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2022-11-19 06:59:42,444 INFO L899 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2022-11-19 06:59:42,444 INFO L895 garLoopResultBuilder]: At program point L37-3(lines 37 48) the Hoare annotation is: (let ((.cse1 (<= 1 |ULTIMATE.start_main_~in~0#1|)) (.cse2 (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|)) (.cse3 (<= 0 |ULTIMATE.start_main_~buf~0#1|))) (or (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|) .cse1 (<= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) .cse2 .cse3)) (and .cse1 .cse2 (<= |ULTIMATE.start_main_~buf~0#1| 2) .cse3 (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2022-11-19 06:59:42,444 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-19 06:59:42,444 INFO L899 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2022-11-19 06:59:42,445 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_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|))) [2022-11-19 06:59:42,445 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_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|))) [2022-11-19 06:59:42,445 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-11-19 06:59:42,445 INFO L902 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2022-11-19 06:59:42,445 INFO L895 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (or (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (< |ULTIMATE.start_main_~bufferlen~0#1| |ULTIMATE.start_main_~inlen~0#1|) (= |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) (<= (+ |ULTIMATE.start_main_~buf~0#1| 2) |ULTIMATE.start_main_~bufferlen~0#1|) (<= 0 |ULTIMATE.start_main_~buf~0#1|)))) [2022-11-19 06:59:42,445 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-11-19 06:59:42,445 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-19 06:59:42,445 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-19 06:59:42,445 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-19 06:59:42,445 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-19 06:59:42,446 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-19 06:59:42,446 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-19 06:59:42,449 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:59:42,453 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 06:59:42,476 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 06:59:42 BoogieIcfgContainer [2022-11-19 06:59:42,476 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 06:59:42,476 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 06:59:42,476 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 06:59:42,476 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 06:59:42,477 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:59:18" (3/4) ... [2022-11-19 06:59:42,479 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-19 06:59:42,485 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-19 06:59:42,489 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-19 06:59:42,489 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-19 06:59:42,489 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-19 06:59:42,489 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-19 06:59:42,519 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 06:59:42,520 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 06:59:42,520 INFO L158 Benchmark]: Toolchain (without parser) took 25170.35ms. Allocated memory was 104.9MB in the beginning and 281.0MB in the end (delta: 176.2MB). Free memory was 60.9MB in the beginning and 145.7MB in the end (delta: -84.8MB). Peak memory consumption was 92.1MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,521 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 77.5MB in the beginning and 77.5MB in the end (delta: 54.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:59:42,521 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.05ms. Allocated memory is still 104.9MB. Free memory was 60.7MB in the beginning and 78.4MB in the end (delta: -17.7MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 37.39ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,522 INFO L158 Benchmark]: Boogie Preprocessor took 23.27ms. Allocated memory is still 104.9MB. Free memory was 76.9MB in the beginning and 75.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 06:59:42,522 INFO L158 Benchmark]: RCFGBuilder took 412.59ms. Allocated memory is still 104.9MB. Free memory was 75.7MB in the beginning and 64.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,522 INFO L158 Benchmark]: TraceAbstraction took 24355.57ms. Allocated memory was 104.9MB in the beginning and 281.0MB in the end (delta: 176.2MB). Free memory was 63.2MB in the beginning and 148.8MB in the end (delta: -85.6MB). Peak memory consumption was 91.9MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,523 INFO L158 Benchmark]: Witness Printer took 43.60ms. Allocated memory is still 281.0MB. Free memory was 148.8MB in the beginning and 145.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 06:59:42,525 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 104.9MB. Free memory was 77.5MB in the beginning and 77.5MB in the end (delta: 54.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.05ms. Allocated memory is still 104.9MB. Free memory was 60.7MB in the beginning and 78.4MB in the end (delta: -17.7MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 37.39ms. Allocated memory is still 104.9MB. Free memory was 78.4MB in the beginning and 76.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.27ms. Allocated memory is still 104.9MB. Free memory was 76.9MB in the beginning and 75.7MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 412.59ms. Allocated memory is still 104.9MB. Free memory was 75.7MB in the beginning and 64.0MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 24355.57ms. Allocated memory was 104.9MB in the beginning and 281.0MB in the end (delta: 176.2MB). Free memory was 63.2MB in the beginning and 148.8MB in the end (delta: -85.6MB). Peak memory consumption was 91.9MB. Max. memory is 16.1GB. * Witness Printer took 43.60ms. Allocated memory is still 281.0MB. Free memory was 148.8MB in the beginning and 145.7MB 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, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 24.3s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 390 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 335 mSDsluCounter, 1107 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 811 mSDsCounter, 354 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1837 IncrementalHoareTripleChecker+Invalid, 2191 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 354 mSolverCounterUnsat, 296 mSDtfsCounter, 1837 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 927 GetRequests, 710 SyntacticMatches, 40 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=98occurred in iteration=9, InterpolantAutomatonStates: 93, 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, 21 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 56 PreInvPairs, 100 NumberOfFragments, 381 HoareAnnotationTreeSize, 56 FomulaSimplifications, 444 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1617 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 657 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 913 ConstructedInterpolants, 0 QuantifiedInterpolants, 3492 SizeOfPredicates, 24 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 79 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2675/2902 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: 37]: Loop Invariant Derived loop invariant: ((((2 <= bufferlen && buf == 0) && bufferlen == 2 + buflim) && bufferlen < inlen) && in == 0) || (((((bufferlen + in + 1 <= buf + inlen && 2 + buflim <= bufferlen) && 1 <= in) && bufferlen <= 2 + buflim) && buf + 2 <= bufferlen) && 0 <= buf) - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-19 06:59:42,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9cc7b47a-9026-4142-9f95-005ccde191df/bin/utaipan-I9t0OCRTmS/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