./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/apache-get-tag.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9 --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 ad8e21886f5f45a7c58400298498a881b4f628bf6fff913be81ab14cf250dd19 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 21:04:50,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 21:04:50,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 21:04:50,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 21:04:50,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 21:04:50,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 21:04:50,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 21:04:50,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 21:04:50,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 21:04:50,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 21:04:50,218 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 21:04:50,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 21:04:50,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 21:04:50,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 21:04:50,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 21:04:50,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 21:04:50,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 21:04:50,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 21:04:50,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 21:04:50,232 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 21:04:50,234 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 21:04:50,236 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 21:04:50,237 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 21:04:50,239 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 21:04:50,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 21:04:50,244 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 21:04:50,245 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 21:04:50,246 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 21:04:50,247 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 21:04:50,248 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 21:04:50,248 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 21:04:50,250 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 21:04:50,251 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 21:04:50,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 21:04:50,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 21:04:50,254 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 21:04:50,255 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 21:04:50,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 21:04:50,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 21:04:50,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 21:04:50,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 21:04:50,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 21:04:50,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 21:04:50,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 21:04:50,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 21:04:50,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 21:04:50,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 21:04:50,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 21:04:50,290 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 21:04:50,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 21:04:50,291 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 21:04:50,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 21:04:50,292 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 21:04:50,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 21:04:50,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 21:04:50,292 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 21:04:50,293 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 21:04:50,293 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 21:04:50,293 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 21:04:50,294 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 21:04:50,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 21:04:50,295 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 21:04:50,295 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 21:04:50,295 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 21:04:50,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 21:04:50,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 21:04:50,296 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 21:04:50,296 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 21:04:50,297 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 21:04:50,297 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 21:04:50,297 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 21:04:50,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 21:04:50,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 21:04:50,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 21:04:50,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:04:50,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 21:04:50,299 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 21:04:50,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 21:04:50,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 21:04:50,300 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 21:04:50,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 21:04:50,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 21:04:50,301 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 21:04:50,301 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ad8e21886f5f45a7c58400298498a881b4f628bf6fff913be81ab14cf250dd19 [2022-11-20 21:04:50,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 21:04:50,628 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 21:04:50,632 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 21:04:50,634 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 21:04:50,634 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 21:04:50,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/loop-invgen/apache-get-tag.i [2022-11-20 21:04:54,408 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 21:04:54,750 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 21:04:54,751 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/sv-benchmarks/c/loop-invgen/apache-get-tag.i [2022-11-20 21:04:54,759 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/data/00fbb6152/13ec2e8bfe3640db8bb0bee062e8f595/FLAGca119df43 [2022-11-20 21:04:54,779 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/data/00fbb6152/13ec2e8bfe3640db8bb0bee062e8f595 [2022-11-20 21:04:54,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 21:04:54,785 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 21:04:54,786 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 21:04:54,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 21:04:54,797 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 21:04:54,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:04:54" (1/1) ... [2022-11-20 21:04:54,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57f5a430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:54, skipping insertion in model container [2022-11-20 21:04:54,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:04:54" (1/1) ... [2022-11-20 21:04:54,810 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 21:04:54,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 21:04:55,028 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/sv-benchmarks/c/loop-invgen/apache-get-tag.i[893,906] [2022-11-20 21:04:55,046 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:04:55,059 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 21:04:55,072 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/sv-benchmarks/c/loop-invgen/apache-get-tag.i[893,906] [2022-11-20 21:04:55,081 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 21:04:55,097 INFO L208 MainTranslator]: Completed translation [2022-11-20 21:04:55,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55 WrapperNode [2022-11-20 21:04:55,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 21:04:55,099 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 21:04:55,099 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 21:04:55,099 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 21:04:55,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,118 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,155 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2022-11-20 21:04:55,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 21:04:55,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 21:04:55,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 21:04:55,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 21:04:55,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,175 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,183 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,184 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,192 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 21:04:55,194 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 21:04:55,194 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 21:04:55,194 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 21:04:55,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (1/1) ... [2022-11-20 21:04:55,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 21:04:55,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:55,248 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 21:04:55,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 21:04:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 21:04:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 21:04:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 21:04:55,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 21:04:55,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-20 21:04:55,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-20 21:04:55,395 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 21:04:55,398 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 21:04:55,697 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 21:04:55,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 21:04:55,740 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 21:04:55,743 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:55 BoogieIcfgContainer [2022-11-20 21:04:55,744 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 21:04:55,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 21:04:55,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 21:04:55,754 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 21:04:55,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 09:04:54" (1/3) ... [2022-11-20 21:04:55,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e85b294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:04:55, skipping insertion in model container [2022-11-20 21:04:55,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:04:55" (2/3) ... [2022-11-20 21:04:55,760 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e85b294 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 09:04:55, skipping insertion in model container [2022-11-20 21:04:55,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:55" (3/3) ... [2022-11-20 21:04:55,766 INFO L112 eAbstractionObserver]: Analyzing ICFG apache-get-tag.i [2022-11-20 21:04:55,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 21:04:55,792 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 21:04:55,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 21:04:55,902 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@57d50300, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 21:04:55,903 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 21:04:55,908 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-20 21:04:55,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 21:04:55,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:55,920 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:55,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:55,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1259343678, now seen corresponding path program 1 times [2022-11-20 21:04:55,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:55,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897711712] [2022-11-20 21:04:55,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:55,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:56,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:56,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897711712] [2022-11-20 21:04:56,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897711712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:56,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:56,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 21:04:56,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048867081] [2022-11-20 21:04:56,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:56,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 21:04:56,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:56,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 21:04:56,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:04:56,259 INFO L87 Difference]: Start difference. First operand has 39 states, 20 states have (on average 1.6) internal successors, (32), 25 states have internal predecessors, (32), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 13 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:56,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:56,371 INFO L93 Difference]: Finished difference Result 76 states and 141 transitions. [2022-11-20 21:04:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 21:04:56,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 21:04:56,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:56,384 INFO L225 Difference]: With dead ends: 76 [2022-11-20 21:04:56,385 INFO L226 Difference]: Without dead ends: 37 [2022-11-20 21:04:56,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 21:04:56,394 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:56,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 21:04:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-20 21:04:56,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-20 21:04:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 23 states have internal predecessors, (27), 16 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 21:04:56,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 55 transitions. [2022-11-20 21:04:56,509 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 55 transitions. Word has length 7 [2022-11-20 21:04:56,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:56,515 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 55 transitions. [2022-11-20 21:04:56,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:56,517 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 55 transitions. [2022-11-20 21:04:56,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 21:04:56,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:56,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:56,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 21:04:56,521 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:56,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:56,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1014785658, now seen corresponding path program 1 times [2022-11-20 21:04:56,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:56,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869916876] [2022-11-20 21:04:56,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:56,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:56,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:56,730 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869916876] [2022-11-20 21:04:56,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869916876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:56,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:56,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 21:04:56,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315147103] [2022-11-20 21:04:56,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:56,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 21:04:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 21:04:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 21:04:56,735 INFO L87 Difference]: Start difference. First operand 37 states and 55 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:56,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:56,915 INFO L93 Difference]: Finished difference Result 43 states and 60 transitions. [2022-11-20 21:04:56,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:04:56,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2022-11-20 21:04:56,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:56,918 INFO L225 Difference]: With dead ends: 43 [2022-11-20 21:04:56,919 INFO L226 Difference]: Without dead ends: 41 [2022-11-20 21:04:56,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:56,921 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 20 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:56,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 69 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:56,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-20 21:04:56,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-20 21:04:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 26 states have internal predecessors, (30), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 21:04:56,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 58 transitions. [2022-11-20 21:04:56,939 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 58 transitions. Word has length 8 [2022-11-20 21:04:56,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:56,939 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 58 transitions. [2022-11-20 21:04:56,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:04:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 58 transitions. [2022-11-20 21:04:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 21:04:56,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:56,942 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:56,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 21:04:56,943 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:56,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:56,944 INFO L85 PathProgramCache]: Analyzing trace with hash 648996039, now seen corresponding path program 1 times [2022-11-20 21:04:56,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:56,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221428239] [2022-11-20 21:04:56,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:56,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 21:04:57,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:57,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221428239] [2022-11-20 21:04:57,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221428239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 21:04:57,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 21:04:57,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 21:04:57,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165361428] [2022-11-20 21:04:57,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 21:04:57,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 21:04:57,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:04:57,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 21:04:57,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 21:04:57,191 INFO L87 Difference]: Start difference. First operand 41 states and 58 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:04:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:04:57,354 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2022-11-20 21:04:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 21:04:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2022-11-20 21:04:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:04:57,357 INFO L225 Difference]: With dead ends: 56 [2022-11-20 21:04:57,357 INFO L226 Difference]: Without dead ends: 48 [2022-11-20 21:04:57,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 21:04:57,360 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 21:04:57,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 21:04:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-20 21:04:57,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-11-20 21:04:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 31 states have internal predecessors, (34), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-20 21:04:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2022-11-20 21:04:57,376 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 13 [2022-11-20 21:04:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:04:57,377 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2022-11-20 21:04:57,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-20 21:04:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2022-11-20 21:04:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 21:04:57,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 21:04:57,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 21:04:57,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 21:04:57,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 21:04:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 21:04:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash -250357373, now seen corresponding path program 1 times [2022-11-20 21:04:57,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 21:04:57,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936108421] [2022-11-20 21:04:57,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:57,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 21:04:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:57,917 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-20 21:04:57,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 21:04:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936108421] [2022-11-20 21:04:57,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936108421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 21:04:57,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643336149] [2022-11-20 21:04:57,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 21:04:57,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:04:57,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 21:04:57,927 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 21:04:57,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 21:04:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 21:04:58,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-20 21:04:58,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 21:04:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:04:58,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 21:04:58,654 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 21:04:58,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643336149] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 21:04:58,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1377051750] [2022-11-20 21:04:58,680 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-20 21:04:58,680 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 21:04:58,685 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 21:04:58,693 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 21:04:58,693 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 21:05:00,373 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 8 for LOIs [2022-11-20 21:05:00,379 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 21:05:01,383 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '680#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 21:05:01,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 21:05:01,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 21:05:01,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 15 [2022-11-20 21:05:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662226162] [2022-11-20 21:05:01,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 21:05:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-20 21:05:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 21:05:01,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-20 21:05:01,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-20 21:05:01,387 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 21:05:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 21:05:01,863 INFO L93 Difference]: Finished difference Result 74 states and 101 transitions. [2022-11-20 21:05:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 21:05:01,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 28 [2022-11-20 21:05:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 21:05:01,864 INFO L225 Difference]: With dead ends: 74 [2022-11-20 21:05:01,865 INFO L226 Difference]: Without dead ends: 0 [2022-11-20 21:05:01,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-11-20 21:05:01,867 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 89 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 21:05:01,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 106 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 21:05:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-20 21:05:01,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-20 21:05:01,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 21:05:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-20 21:05:01,870 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-11-20 21:05:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 21:05:01,870 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-20 21:05:01,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 21:05:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-20 21:05:01,887 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-20 21:05:01,890 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 21:05:01,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 21:05:02,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 21:05:02,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-11-20 21:05:02,392 INFO L895 garLoopResultBuilder]: At program point L60(line 60) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,393 INFO L895 garLoopResultBuilder]: At program point L60-1(line 60) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,393 INFO L895 garLoopResultBuilder]: At program point L56(line 56) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,393 INFO L895 garLoopResultBuilder]: At program point L56-1(line 56) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,393 INFO L895 garLoopResultBuilder]: At program point L48-2(lines 48 72) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,394 INFO L895 garLoopResultBuilder]: At program point L48-3(lines 48 72) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,394 INFO L895 garLoopResultBuilder]: At program point L73(line 73) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,394 INFO L895 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,394 INFO L895 garLoopResultBuilder]: At program point L32-2(lines 32 44) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,394 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-11-20 21:05:02,395 INFO L895 garLoopResultBuilder]: At program point L32-3(lines 32 44) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,395 INFO L899 garLoopResultBuilder]: For program point L57(line 57) no Hoare annotation was computed. [2022-11-20 21:05:02,395 INFO L899 garLoopResultBuilder]: For program point L49(lines 49 53) no Hoare annotation was computed. [2022-11-20 21:05:02,395 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,395 INFO L902 garLoopResultBuilder]: At program point L74(lines 25 77) the Hoare annotation is: true [2022-11-20 21:05:02,396 INFO L895 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,396 INFO L895 garLoopResultBuilder]: At program point L41-1(line 41) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,396 INFO L899 garLoopResultBuilder]: For program point L70(line 70) no Hoare annotation was computed. [2022-11-20 21:05:02,396 INFO L899 garLoopResultBuilder]: For program point L66(lines 66 68) no Hoare annotation was computed. [2022-11-20 21:05:02,396 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 37) no Hoare annotation was computed. [2022-11-20 21:05:02,396 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-11-20 21:05:02,397 INFO L899 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-11-20 21:05:02,397 INFO L899 garLoopResultBuilder]: For program point L54(lines 54 68) no Hoare annotation was computed. [2022-11-20 21:05:02,397 INFO L895 garLoopResultBuilder]: At program point L54-1(lines 54 68) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (< |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,397 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,397 INFO L895 garLoopResultBuilder]: At program point L50-1(line 50) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,398 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-11-20 21:05:02,398 INFO L899 garLoopResultBuilder]: For program point L42(line 42) no Hoare annotation was computed. [2022-11-20 21:05:02,398 INFO L899 garLoopResultBuilder]: For program point L38(lines 38 40) no Hoare annotation was computed. [2022-11-20 21:05:02,398 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,398 INFO L895 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= 0 |ULTIMATE.start_main_~t~0#1|) (<= |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~tagbuf_len~0#1|)) [2022-11-20 21:05:02,399 INFO L899 garLoopResultBuilder]: For program point L59(lines 59 63) no Hoare annotation was computed. [2022-11-20 21:05:02,400 INFO L899 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2022-11-20 21:05:02,400 INFO L899 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-11-20 21:05:02,400 INFO L902 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-11-20 21:05:02,400 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-11-20 21:05:02,401 INFO L899 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-11-20 21:05:02,401 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-11-20 21:05:02,401 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-11-20 21:05:02,406 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-20 21:05:02,409 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 21:05:02,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 09:05:02 BoogieIcfgContainer [2022-11-20 21:05:02,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 21:05:02,436 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 21:05:02,436 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 21:05:02,436 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 21:05:02,437 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:04:55" (3/4) ... [2022-11-20 21:05:02,441 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-20 21:05:02,448 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-20 21:05:02,457 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2022-11-20 21:05:02,458 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-20 21:05:02,459 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-20 21:05:02,460 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-20 21:05:02,529 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/witness.graphml [2022-11-20 21:05:02,529 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 21:05:02,530 INFO L158 Benchmark]: Toolchain (without parser) took 7745.58ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 141.0MB in the beginning and 97.7MB in the end (delta: 43.2MB). Peak memory consumption was 91.5MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,530 INFO L158 Benchmark]: CDTParser took 0.73ms. Allocated memory is still 121.6MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:05:02,531 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.59ms. Allocated memory is still 172.0MB. Free memory was 140.4MB in the beginning and 129.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,531 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.79ms. Allocated memory is still 172.0MB. Free memory was 129.9MB in the beginning and 128.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 21:05:02,532 INFO L158 Benchmark]: Boogie Preprocessor took 36.39ms. Allocated memory is still 172.0MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,532 INFO L158 Benchmark]: RCFGBuilder took 550.41ms. Allocated memory is still 172.0MB. Free memory was 127.2MB in the beginning and 114.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,535 INFO L158 Benchmark]: TraceAbstraction took 6686.59ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 113.7MB in the beginning and 100.9MB in the end (delta: 12.8MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,536 INFO L158 Benchmark]: Witness Printer took 93.72ms. Allocated memory is still 218.1MB. Free memory was 100.9MB in the beginning and 97.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 21:05:02,538 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73ms. Allocated memory is still 121.6MB. Free memory is still 74.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.59ms. Allocated memory is still 172.0MB. Free memory was 140.4MB in the beginning and 129.9MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.79ms. Allocated memory is still 172.0MB. Free memory was 129.9MB in the beginning and 128.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 36.39ms. Allocated memory is still 172.0MB. Free memory was 128.4MB in the beginning and 127.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 550.41ms. Allocated memory is still 172.0MB. Free memory was 127.2MB in the beginning and 114.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6686.59ms. Allocated memory was 172.0MB in the beginning and 218.1MB in the end (delta: 46.1MB). Free memory was 113.7MB in the beginning and 100.9MB in the end (delta: 12.8MB). Peak memory consumption was 62.1MB. Max. memory is 16.1GB. * Witness Printer took 93.72ms. Allocated memory is still 218.1MB. Free memory was 100.9MB in the beginning and 97.7MB in the end (delta: 3.1MB). 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, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.5s, OverallIterations: 4, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 145 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 118 mSDsluCounter, 406 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 241 mSDsCounter, 141 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 502 IncrementalHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 141 mSolverCounterUnsat, 165 mSDtfsCounter, 502 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=3, InterpolantAutomatonStates: 26, 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, 4 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 20 LocationsWithAnnotation, 65 PreInvPairs, 101 NumberOfFragments, 128 HoareAnnotationTreeSize, 65 FomulaSimplifications, 39 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 20 FomulaSimplificationsInter, 226 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 84 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 379 SizeOfPredicates, 3 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 44/65 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: 32]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 48]: Loop Invariant Derived loop invariant: 0 <= t && t <= tagbuf_len - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-11-20 21:05:02,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9d89507c-87f9-4764-b34a-2d9c71a12781/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE