./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 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7 --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 --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:54:00,616 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:54:00,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:54:00,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:54:00,667 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:54:00,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:54:00,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:54:00,672 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:54:00,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:54:00,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:54:00,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:54:00,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:54:00,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:54:00,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:54:00,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:54:00,683 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:54:00,684 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:54:00,685 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:54:00,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:54:00,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:54:00,692 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:54:00,694 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:54:00,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:54:00,697 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:54:00,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:54:00,702 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:54:00,705 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:54:00,706 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:54:00,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:54:00,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:54:00,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:54:00,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:54:00,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:54:00,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:54:00,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:54:00,713 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:54:00,714 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:54:00,714 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:54:00,714 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:54:00,716 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:54:00,716 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:54:00,721 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 19:54:00,766 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:54:00,766 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:54:00,766 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:54:00,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:54:00,767 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:54:00,767 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:54:00,767 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:54:00,768 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:54:00,768 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:54:00,771 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:54:00,772 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:54:00,772 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:54:00,773 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:54:00,773 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:54:00,773 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:54:00,773 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:54:00,774 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:54:00,774 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:54:00,774 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:54:00,775 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:54:00,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:54:00,775 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:54:00,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:54:00,775 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 19:54:00,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:54:00,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 19:54:00,776 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:54:00,776 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 19:54:00,776 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:54:00,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 19:54:00,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:54:00,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:54:00,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:00,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:54:00,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:54:00,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 19:54:00,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:54:00,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:54:00,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 19:54:00,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:54:00,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:54:00,779 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4be4b344509b887bc91f2389f98de1e4ff745494aee0f078864fd49e79b0b4b8 [2021-11-25 19:54:01,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:54:01,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:54:01,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:54:01,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:54:01,054 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:54:01,055 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-11-25 19:54:01,157 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/data/d6bf9e2e7/cf4cfb27f4354e33bc41ee81e10f7edf/FLAG523cb24ad [2021-11-25 19:54:01,610 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:54:01,610 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i [2021-11-25 19:54:01,619 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/data/d6bf9e2e7/cf4cfb27f4354e33bc41ee81e10f7edf/FLAG523cb24ad [2021-11-25 19:54:02,001 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/data/d6bf9e2e7/cf4cfb27f4354e33bc41ee81e10f7edf [2021-11-25 19:54:02,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:54:02,004 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:54:02,005 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:02,006 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:54:02,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:54:02,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,011 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd4e2cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02, skipping insertion in model container [2021-11-25 19:54:02,011 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,018 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:54:02,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:54:02,259 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-11-25 19:54:02,279 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:02,293 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:54:02,309 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/sv-benchmarks/c/loop-invgen/sendmail-close-angle.i[893,906] [2021-11-25 19:54:02,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:54:02,339 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:54:02,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02 WrapperNode [2021-11-25 19:54:02,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:54:02,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:02,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:54:02,341 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:54:02,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,379 INFO L137 Inliner]: procedures = 16, calls = 14, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 60 [2021-11-25 19:54:02,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:54:02,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:54:02,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:54:02,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:54:02,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,406 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,407 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,424 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,426 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:54:02,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:54:02,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:54:02,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:54:02,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (1/1) ... [2021-11-25 19:54:02,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:54:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:02,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:54:02,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:54:02,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:54:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:54:02,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:54:02,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:54:02,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-25 19:54:02,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-25 19:54:02,573 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:54:02,575 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:54:02,748 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:54:02,776 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:54:02,789 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 19:54:02,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:54:02 BoogieIcfgContainer [2021-11-25 19:54:02,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:54:02,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:54:02,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:54:02,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:54:02,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:54:02" (1/3) ... [2021-11-25 19:54:02,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a69af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:54:02, skipping insertion in model container [2021-11-25 19:54:02,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:54:02" (2/3) ... [2021-11-25 19:54:02,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@378a69af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:54:02, skipping insertion in model container [2021-11-25 19:54:02,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:54:02" (3/3) ... [2021-11-25 19:54:02,811 INFO L111 eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i [2021-11-25 19:54:02,816 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:54:02,817 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 19:54:02,901 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:54:02,913 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=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, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:54:02,913 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 19:54:02,942 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) [2021-11-25 19:54:02,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:54:02,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:02,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:02,948 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash -802314430, now seen corresponding path program 1 times [2021-11-25 19:54:02,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:02,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334414261] [2021-11-25 19:54:02,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:02,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:03,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:03,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334414261] [2021-11-25 19:54:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334414261] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:03,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:03,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:54:03,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482051824] [2021-11-25 19:54:03,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:03,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-25 19:54:03,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-25 19:54:03,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-25 19:54:03,136 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) [2021-11-25 19:54:03,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:03,166 INFO L93 Difference]: Finished difference Result 48 states and 79 transitions. [2021-11-25 19:54:03,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-25 19:54:03,168 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 [2021-11-25 19:54:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:03,175 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:54:03,175 INFO L226 Difference]: Without dead ends: 23 [2021-11-25 19:54:03,178 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:54:03,184 INFO L933 BasicCegarLoop]: 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 [2021-11-25 19:54:03,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:54:03,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-25 19:54:03,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-25 19:54:03,227 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) [2021-11-25 19:54:03,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-11-25 19:54:03,232 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 9 [2021-11-25 19:54:03,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:03,232 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-11-25 19:54:03,233 INFO L471 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) [2021-11-25 19:54:03,233 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-11-25 19:54:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-25 19:54:03,236 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:03,236 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:03,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:54:03,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:03,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:03,243 INFO L85 PathProgramCache]: Analyzing trace with hash 310336716, now seen corresponding path program 1 times [2021-11-25 19:54:03,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:03,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161097370] [2021-11-25 19:54:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:03,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:03,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:03,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161097370] [2021-11-25 19:54:03,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161097370] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:03,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:03,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:54:03,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467275524] [2021-11-25 19:54:03,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:03,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:54:03,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:54:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:54:03,336 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) [2021-11-25 19:54:03,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:03,415 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-11-25 19:54:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:54:03,416 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 [2021-11-25 19:54:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:03,417 INFO L225 Difference]: With dead ends: 29 [2021-11-25 19:54:03,417 INFO L226 Difference]: Without dead ends: 27 [2021-11-25 19:54:03,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:03,420 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:03,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 64 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:54:03,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-25 19:54:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-25 19:54:03,429 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) [2021-11-25 19:54:03,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-11-25 19:54:03,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2021-11-25 19:54:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:03,431 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-11-25 19:54:03,432 INFO L471 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) [2021-11-25 19:54:03,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-11-25 19:54:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:54:03,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:03,433 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:03,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:54:03,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:03,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:03,435 INFO L85 PathProgramCache]: Analyzing trace with hash 340662799, now seen corresponding path program 1 times [2021-11-25 19:54:03,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:03,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397587028] [2021-11-25 19:54:03,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:03,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:54:03,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:03,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397587028] [2021-11-25 19:54:03,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397587028] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:03,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:03,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:54:03,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701694385] [2021-11-25 19:54:03,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:03,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:54:03,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:54:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:03,551 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) [2021-11-25 19:54:03,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:03,645 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2021-11-25 19:54:03,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:54:03,646 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 [2021-11-25 19:54:03,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:03,648 INFO L225 Difference]: With dead ends: 42 [2021-11-25 19:54:03,648 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 19:54:03,648 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:54:03,650 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 20 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:03,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 101 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:03,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 19:54:03,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-11-25 19:54:03,661 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) [2021-11-25 19:54:03,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2021-11-25 19:54:03,663 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 15 [2021-11-25 19:54:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:03,663 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2021-11-25 19:54:03,664 INFO L471 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) [2021-11-25 19:54:03,664 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2021-11-25 19:54:03,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:54:03,665 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:03,665 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:03,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:54:03,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1687915168, now seen corresponding path program 1 times [2021-11-25 19:54:03,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:03,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115343131] [2021-11-25 19:54:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:03,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:03,741 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-25 19:54:03,742 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:03,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115343131] [2021-11-25 19:54:03,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115343131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:03,743 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:03,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 19:54:03,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761042373] [2021-11-25 19:54:03,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:03,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:54:03,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:03,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:54:03,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:54:03,747 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) [2021-11-25 19:54:03,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:03,875 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2021-11-25 19:54:03,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:54:03,875 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 [2021-11-25 19:54:03,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:03,880 INFO L225 Difference]: With dead ends: 48 [2021-11-25 19:54:03,880 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:54:03,881 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:54:03,893 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:03,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:03,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:54:03,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2021-11-25 19:54:03,902 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) [2021-11-25 19:54:03,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2021-11-25 19:54:03,903 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2021-11-25 19:54:03,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:03,904 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2021-11-25 19:54:03,904 INFO L471 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) [2021-11-25 19:54:03,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2021-11-25 19:54:03,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 19:54:03,905 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:03,905 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:03,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:54:03,906 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -194088064, now seen corresponding path program 1 times [2021-11-25 19:54:03,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:03,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914228374] [2021-11-25 19:54:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:03,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:03,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:54:03,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:03,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914228374] [2021-11-25 19:54:03,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914228374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:03,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:03,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:54:03,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295686065] [2021-11-25 19:54:03,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:03,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:54:03,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:54:03,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:03,984 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) [2021-11-25 19:54:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:04,154 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2021-11-25 19:54:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:54:04,155 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 [2021-11-25 19:54:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:04,160 INFO L225 Difference]: With dead ends: 67 [2021-11-25 19:54:04,160 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 19:54:04,162 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:54:04,169 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:04,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 19:54:04,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2021-11-25 19:54:04,188 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) [2021-11-25 19:54:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 71 transitions. [2021-11-25 19:54:04,195 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 71 transitions. Word has length 26 [2021-11-25 19:54:04,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:04,196 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 71 transitions. [2021-11-25 19:54:04,196 INFO L471 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) [2021-11-25 19:54:04,200 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 71 transitions. [2021-11-25 19:54:04,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-25 19:54:04,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:04,203 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:04,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:54:04,204 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:04,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:04,205 INFO L85 PathProgramCache]: Analyzing trace with hash -414236357, now seen corresponding path program 1 times [2021-11-25 19:54:04,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:04,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405245398] [2021-11-25 19:54:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:04,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:04,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-25 19:54:04,314 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:04,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405245398] [2021-11-25 19:54:04,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405245398] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:54:04,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:54:04,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:54:04,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116504244] [2021-11-25 19:54:04,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:54:04,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:54:04,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:04,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:54:04,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-25 19:54:04,316 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) [2021-11-25 19:54:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:04,395 INFO L93 Difference]: Finished difference Result 68 states and 81 transitions. [2021-11-25 19:54:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:54:04,396 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 [2021-11-25 19:54:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:04,397 INFO L225 Difference]: With dead ends: 68 [2021-11-25 19:54:04,398 INFO L226 Difference]: Without dead ends: 66 [2021-11-25 19:54:04,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-25 19:54:04,399 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:04,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 144 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:54:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-25 19:54:04,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-11-25 19:54:04,409 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) [2021-11-25 19:54:04,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2021-11-25 19:54:04,411 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 27 [2021-11-25 19:54:04,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:04,411 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2021-11-25 19:54:04,411 INFO L471 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) [2021-11-25 19:54:04,411 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2021-11-25 19:54:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-25 19:54:04,413 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:04,413 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:54:04,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 19:54:04,414 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:04,414 INFO L85 PathProgramCache]: Analyzing trace with hash -911118985, now seen corresponding path program 1 times [2021-11-25 19:54:04,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:04,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203241858] [2021-11-25 19:54:04,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:04,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:04,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203241858] [2021-11-25 19:54:04,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203241858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:04,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600446365] [2021-11-25 19:54:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:04,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:04,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:04,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:04,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:54:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:04,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-25 19:54:04,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:05,125 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:05,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:05,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600446365] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:05,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673985527] [2021-11-25 19:54:05,374 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:54:05,374 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:05,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:05,384 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:05,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:11,515 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2021-11-25 19:54:11,525 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:12,485 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1177#(and (<= 0 |#NULL.base|) (<= |#NULL.offset| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|))' at error location [2021-11-25 19:54:12,485 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:12,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:12,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2021-11-25 19:54:12,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108571410] [2021-11-25 19:54:12,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:12,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-25 19:54:12,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:12,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-25 19:54:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:54:12,488 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 19:54:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:12,968 INFO L93 Difference]: Finished difference Result 105 states and 140 transitions. [2021-11-25 19:54:12,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 19:54:12,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 50 [2021-11-25 19:54:12,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:12,971 INFO L225 Difference]: With dead ends: 105 [2021-11-25 19:54:12,971 INFO L226 Difference]: Without dead ends: 90 [2021-11-25 19:54:12,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-11-25 19:54:12,974 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 49 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:12,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 286 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:12,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-25 19:54:12,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2021-11-25 19:54:12,986 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) [2021-11-25 19:54:12,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 101 transitions. [2021-11-25 19:54:12,988 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 101 transitions. Word has length 50 [2021-11-25 19:54:12,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:12,988 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 101 transitions. [2021-11-25 19:54:12,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 19:54:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 101 transitions. [2021-11-25 19:54:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-25 19:54:12,990 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:12,990 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:13,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-25 19:54:13,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:13,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1167358428, now seen corresponding path program 1 times [2021-11-25 19:54:13,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:13,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550970427] [2021-11-25 19:54:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:13,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550970427] [2021-11-25 19:54:13,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550970427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:13,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217526148] [2021-11-25 19:54:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:13,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:13,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:13,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:13,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:54:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:13,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:54:13,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:13,551 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:13,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-25 19:54:13,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217526148] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:13,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [756532860] [2021-11-25 19:54:13,688 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:54:13,688 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:13,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:13,688 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:13,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:16,349 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2021-11-25 19:54:16,389 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:17,219 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1800#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:17,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:17,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:17,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2021-11-25 19:54:17,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348295189] [2021-11-25 19:54:17,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:17,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:54:17,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:17,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:54:17,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-11-25 19:54:17,222 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 19:54:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:17,341 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2021-11-25 19:54:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:54:17,341 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 51 [2021-11-25 19:54:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:17,344 INFO L225 Difference]: With dead ends: 88 [2021-11-25 19:54:17,344 INFO L226 Difference]: Without dead ends: 86 [2021-11-25 19:54:17,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2021-11-25 19:54:17,346 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 44 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:17,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 183 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:54:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-25 19:54:17,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-11-25 19:54:17,357 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) [2021-11-25 19:54:17,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2021-11-25 19:54:17,359 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 51 [2021-11-25 19:54:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:17,359 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2021-11-25 19:54:17,360 INFO L471 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, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-11-25 19:54:17,360 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2021-11-25 19:54:17,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-25 19:54:17,363 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:17,363 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:17,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:17,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:54:17,574 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:17,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash 502390797, now seen corresponding path program 2 times [2021-11-25 19:54:17,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:17,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129051316] [2021-11-25 19:54:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:17,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2021-11-25 19:54:17,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129051316] [2021-11-25 19:54:17,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129051316] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:17,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315940351] [2021-11-25 19:54:17,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:17,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:17,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:17,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:17,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:54:17,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-25 19:54:17,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:17,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:54:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:18,107 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-25 19:54:18,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 22 proven. 24 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-11-25 19:54:18,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315940351] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [271878551] [2021-11-25 19:54:18,304 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 19:54:18,304 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:18,305 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:18,305 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:18,305 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:20,838 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs [2021-11-25 19:54:20,877 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:21,704 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2534#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-25 19:54:21,704 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:21,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:21,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 20 [2021-11-25 19:54:21,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290812703] [2021-11-25 19:54:21,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:21,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-25 19:54:21,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:21,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-25 19:54:21,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2021-11-25 19:54:21,707 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-25 19:54:22,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:22,244 INFO L93 Difference]: Finished difference Result 102 states and 124 transitions. [2021-11-25 19:54:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-25 19:54:22,244 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) Word has length 75 [2021-11-25 19:54:22,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:22,246 INFO L225 Difference]: With dead ends: 102 [2021-11-25 19:54:22,246 INFO L226 Difference]: Without dead ends: 100 [2021-11-25 19:54:22,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 195 SyntacticMatches, 9 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=273, Invalid=1797, Unknown=0, NotChecked=0, Total=2070 [2021-11-25 19:54:22,248 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:22,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 170 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:54:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-25 19:54:22,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2021-11-25 19:54:22,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 58 states have internal predecessors, (60), 24 states have call successors, (24), 10 states have call predecessors, (24), 10 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2021-11-25 19:54:22,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2021-11-25 19:54:22,262 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 75 [2021-11-25 19:54:22,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:22,262 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2021-11-25 19:54:22,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2021-11-25 19:54:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2021-11-25 19:54:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-25 19:54:22,267 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:54:22,267 INFO L514 BasicCegarLoop]: 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] [2021-11-25 19:54:22,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:22,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-25 19:54:22,482 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 19:54:22,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:54:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash -331070875, now seen corresponding path program 2 times [2021-11-25 19:54:22,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:54:22,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992832798] [2021-11-25 19:54:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:54:22,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:54:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:54:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 56 proven. 46 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2021-11-25 19:54:22,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:54:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992832798] [2021-11-25 19:54:22,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992832798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:54:22,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052309040] [2021-11-25 19:54:22,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:54:22,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:22,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:54:22,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:54:22,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:54:22,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-25 19:54:22,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:54:22,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:54:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:54:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-25 19:54:23,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:54:23,411 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 68 proven. 20 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2021-11-25 19:54:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052309040] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:54:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [688985130] [2021-11-25 19:54:23,414 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2021-11-25 19:54:23,414 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:54:23,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:54:23,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:54:23,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:54:26,326 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2021-11-25 19:54:26,330 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:54:27,378 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3450#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0))' at error location [2021-11-25 19:54:27,378 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:54:27,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:54:27,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 18 [2021-11-25 19:54:27,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094730022] [2021-11-25 19:54:27,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:54:27,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-25 19:54:27,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:54:27,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-25 19:54:27,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-11-25 19:54:27,381 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-25 19:54:27,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:54:27,737 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2021-11-25 19:54:27,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-25 19:54:27,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) Word has length 98 [2021-11-25 19:54:27,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:54:27,738 INFO L225 Difference]: With dead ends: 90 [2021-11-25 19:54:27,738 INFO L226 Difference]: Without dead ends: 0 [2021-11-25 19:54:27,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 265 SyntacticMatches, 13 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-11-25 19:54:27,740 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 19:54:27,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 206 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 19:54:27,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-25 19:54:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-25 19:54:27,742 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) [2021-11-25 19:54:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-25 19:54:27,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 98 [2021-11-25 19:54:27,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:54:27,743 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-25 19:54:27,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 9 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 10 states have call predecessors, (23), 9 states have call successors, (23) [2021-11-25 19:54:27,743 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-25 19:54:27,743 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-25 19:54:27,746 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-25 19:54:27,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:54:27,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:54:27,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-25 19:54:28,634 INFO L858 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2021-11-25 19:54:28,635 INFO L858 garLoopResultBuilder]: For program point L31-1(lines 25 56) no Hoare annotation was computed. [2021-11-25 19:54:28,635 INFO L854 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|)) [2021-11-25 19:54:28,635 INFO L854 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|)) [2021-11-25 19:54:28,635 INFO L858 garLoopResultBuilder]: For program point L32(lines 25 56) no Hoare annotation was computed. [2021-11-25 19:54:28,635 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-25 19:54:28,636 INFO L858 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2021-11-25 19:54:28,636 INFO L854 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) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2021-11-25 19:54:28,636 INFO L854 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) (< .cse0 |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2021-11-25 19:54:28,636 INFO L854 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) (< .cse0 |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (= |ULTIMATE.start_main_~in~0#1| 0) (<= 3 |ULTIMATE.start_main_~bufferlen~0#1|)))) [2021-11-25 19:54:28,636 INFO L858 garLoopResultBuilder]: For program point L37-1(lines 37 48) no Hoare annotation was computed. [2021-11-25 19:54:28,637 INFO L854 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) (and (<= 2 |ULTIMATE.start_main_~bufferlen~0#1|) (= |ULTIMATE.start_main_~buf~0#1| 0) (= |ULTIMATE.start_main_~in~0#1| 0)))) [2021-11-25 19:54:28,637 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-25 19:54:28,637 INFO L858 garLoopResultBuilder]: For program point L50(line 50) no Hoare annotation was computed. [2021-11-25 19:54:28,637 INFO L854 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|))) [2021-11-25 19:54:28,637 INFO L854 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|))) [2021-11-25 19:54:28,637 INFO L858 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2021-11-25 19:54:28,637 INFO L861 garLoopResultBuilder]: At program point L55(lines 25 56) the Hoare annotation is: true [2021-11-25 19:54:28,637 INFO L854 garLoopResultBuilder]: At program point L47(lines 37 48) the Hoare annotation is: (let ((.cse0 (+ 2 |ULTIMATE.start_main_~buflim~0#1|))) (or (and (< 0 (+ |ULTIMATE.start_main_~buflim~0#1| 1)) (= |ULTIMATE.start_main_~buf~0#1| 0) (< .cse0 |ULTIMATE.start_main_~inlen~0#1|) (= |ULTIMATE.start_main_~bufferlen~0#1| .cse0) (= |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|)))) [2021-11-25 19:54:28,637 INFO L858 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2021-11-25 19:54:28,637 INFO L858 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-11-25 19:54:28,638 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-11-25 19:54:28,638 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-11-25 19:54:28,638 INFO L858 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2021-11-25 19:54:28,638 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-11-25 19:54:28,638 INFO L858 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-11-25 19:54:28,641 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 19:54:28,642 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-25 19:54:28,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 07:54:28 BoogieIcfgContainer [2021-11-25 19:54:28,654 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-25 19:54:28,657 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-25 19:54:28,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-25 19:54:28,657 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-25 19:54:28,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:54:02" (3/4) ... [2021-11-25 19:54:28,661 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-25 19:54:28,668 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2021-11-25 19:54:28,672 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-11-25 19:54:28,672 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-25 19:54:28,673 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-11-25 19:54:28,673 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-25 19:54:28,709 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/witness.graphml [2021-11-25 19:54:28,710 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-25 19:54:28,710 INFO L158 Benchmark]: Toolchain (without parser) took 26706.56ms. Allocated memory was 92.3MB in the beginning and 413.1MB in the end (delta: 320.9MB). Free memory was 58.1MB in the beginning and 269.0MB in the end (delta: -210.9MB). Peak memory consumption was 110.2MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,711 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 92.3MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:54:28,711 INFO L158 Benchmark]: CACSL2BoogieTranslator took 334.83ms. Allocated memory was 92.3MB in the beginning and 125.8MB in the end (delta: 33.6MB). Free memory was 58.1MB in the beginning and 101.9MB in the end (delta: -43.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,712 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.40ms. Allocated memory is still 125.8MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-25 19:54:28,712 INFO L158 Benchmark]: Boogie Preprocessor took 51.74ms. Allocated memory is still 125.8MB. Free memory was 100.4MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,713 INFO L158 Benchmark]: RCFGBuilder took 358.13ms. Allocated memory is still 125.8MB. Free memory was 99.1MB in the beginning and 88.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,713 INFO L158 Benchmark]: TraceAbstraction took 25860.48ms. Allocated memory was 125.8MB in the beginning and 413.1MB in the end (delta: 287.3MB). Free memory was 87.9MB in the beginning and 272.1MB in the end (delta: -184.2MB). Peak memory consumption was 104.5MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,713 INFO L158 Benchmark]: Witness Printer took 52.88ms. Allocated memory is still 413.1MB. Free memory was 271.1MB in the beginning and 269.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-25 19:54:28,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 92.3MB. Free memory was 63.6MB in the beginning and 63.6MB in the end (delta: 30.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 334.83ms. Allocated memory was 92.3MB in the beginning and 125.8MB in the end (delta: 33.6MB). Free memory was 58.1MB in the beginning and 101.9MB in the end (delta: -43.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.40ms. Allocated memory is still 125.8MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 51.74ms. Allocated memory is still 125.8MB. Free memory was 100.4MB in the beginning and 99.1MB in the end (delta: 1.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 358.13ms. Allocated memory is still 125.8MB. Free memory was 99.1MB in the beginning and 88.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 25860.48ms. Allocated memory was 125.8MB in the beginning and 413.1MB in the end (delta: 287.3MB). Free memory was 87.9MB in the beginning and 272.1MB in the end (delta: -184.2MB). Peak memory consumption was 104.5MB. Max. memory is 16.1GB. * Witness Printer took 52.88ms. Allocated memory is still 413.1MB. Free memory was 271.1MB in the beginning and 269.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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: 25.7s, OverallIterations: 10, TraceHistogramMax: 16, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.7s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 335 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 281 mSDsluCounter, 1473 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1194 mSDsCounter, 340 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1269 IncrementalHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 340 mSolverCounterUnsat, 314 mSDtfsCounter, 1269 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 935 GetRequests, 719 SyntacticMatches, 38 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 5.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=9, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 56 PreInvPairs, 100 NumberOfFragments, 383 HoareAnnotationTreeSize, 56 FomulaSimplifications, 329 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 1996 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.1s InterpolantComputationTime, 657 NumberOfCodeBlocks, 620 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 913 ConstructedInterpolants, 0 QuantifiedInterpolants, 3227 SizeOfPredicates, 16 NumberOfNonLiveVariables, 545 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 18 InterpolantComputations, 6 PerfectInterpolantSequences, 2717/2902 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: ((((0 < buflim + 1 && buf == 0) && 2 + buflim < inlen) && bufferlen == 2 + buflim) && 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! [2021-11-25 19:54:28,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9572cd0d-d7d3-443f-b750-77352ffe7e39/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE