./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE --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 153b6d90c91de27e09ed3c918b0b1be779b258e790f6fc392e7d5f390719c2db ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:28:37,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:28:37,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:28:37,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:28:37,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:28:37,168 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:28:37,170 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:28:37,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:28:37,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:28:37,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:28:37,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:28:37,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:28:37,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:28:37,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:28:37,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:28:37,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:28:37,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:28:37,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:28:37,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:28:37,218 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:28:37,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:28:37,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:28:37,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:28:37,233 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:28:37,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:28:37,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:28:37,239 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:28:37,240 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:28:37,241 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:28:37,242 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:28:37,242 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:28:37,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:28:37,246 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:28:37,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:28:37,251 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:28:37,251 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:28:37,252 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:28:37,252 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:28:37,253 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:28:37,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:28:37,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:28:37,256 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-24 10:28:37,318 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:28:37,318 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:28:37,320 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:28:37,320 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:28:37,321 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:28:37,321 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:28:37,321 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:28:37,322 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:28:37,322 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:28:37,322 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:28:37,324 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:28:37,324 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:28:37,324 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:28:37,325 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:28:37,325 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:28:37,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:28:37,326 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-24 10:28:37,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:28:37,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-24 10:28:37,327 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:28:37,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:28:37,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:28:37,328 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:28:37,328 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-24 10:28:37,328 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-24 10:28:37,329 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:28:37,329 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:28:37,329 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:28:37,330 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:28:37,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:28:37,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:28:37,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:28:37,333 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:28:37,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:28:37,333 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:28:37,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:28:37,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:28:37,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:28:37,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:28:37,334 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_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 153b6d90c91de27e09ed3c918b0b1be779b258e790f6fc392e7d5f390719c2db [2021-10-24 10:28:37,646 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:28:37,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:28:37,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:28:37,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:28:37,685 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:28:37,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2021-10-24 10:28:37,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/data/74d69cc53/67d333ee35b04a049181360f194a9259/FLAG3849d071a [2021-10-24 10:28:38,382 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:28:38,383 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c [2021-10-24 10:28:38,392 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/data/74d69cc53/67d333ee35b04a049181360f194a9259/FLAG3849d071a [2021-10-24 10:28:38,751 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/data/74d69cc53/67d333ee35b04a049181360f194a9259 [2021-10-24 10:28:38,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:28:38,759 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:28:38,768 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:28:38,768 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:28:38,772 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:28:38,773 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:28:38" (1/1) ... [2021-10-24 10:28:38,774 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4945704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:38, skipping insertion in model container [2021-10-24 10:28:38,775 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:28:38" (1/1) ... [2021-10-24 10:28:38,784 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:28:38,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:28:39,029 WARN L228 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_b1eda3b4-bd76-4036-a9bd-822dd812ae47/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c[8244,8257] [2021-10-24 10:28:39,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:28:39,044 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:28:39,067 WARN L228 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_b1eda3b4-bd76-4036-a9bd-822dd812ae47/sv-benchmarks/c/openssl-simplified/s3_srvr_1b.cil.c[8244,8257] [2021-10-24 10:28:39,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:28:39,083 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:28:39,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39 WrapperNode [2021-10-24 10:28:39,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:28:39,086 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:28:39,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:28:39,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:28:39,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,103 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:28:39,123 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:28:39,124 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:28:39,124 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:28:39,134 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,140 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:28:39,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:28:39,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:28:39,152 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:28:39,153 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (1/1) ... [2021-10-24 10:28:39,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:28:39,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:39,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:28:39,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:28:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-24 10:28:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-24 10:28:39,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:28:39,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:28:39,693 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:28:39,693 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-24 10:28:39,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:39 BoogieIcfgContainer [2021-10-24 10:28:39,696 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:28:39,698 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:28:39,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:28:39,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:28:39,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:28:38" (1/3) ... [2021-10-24 10:28:39,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88697c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:28:39, skipping insertion in model container [2021-10-24 10:28:39,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:28:39" (2/3) ... [2021-10-24 10:28:39,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d88697c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:28:39, skipping insertion in model container [2021-10-24 10:28:39,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:39" (3/3) ... [2021-10-24 10:28:39,720 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1b.cil.c [2021-10-24 10:28:39,727 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:28:39,727 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-24 10:28:39,811 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:28:39,821 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 [2021-10-24 10:28:39,821 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-24 10:28:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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) [2021-10-24 10:28:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:28:39,853 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:39,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:28:39,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 4062681, now seen corresponding path program 1 times [2021-10-24 10:28:39,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:39,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199477609] [2021-10-24 10:28:39,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:39,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:40,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:40,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:40,081 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:40,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199477609] [2021-10-24 10:28:40,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199477609] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:40,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:40,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:28:40,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246306471] [2021-10-24 10:28:40,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:28:40,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:40,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:28:40,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:28:40,111 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 15 states have internal predecessors, (25), 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) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:28:40,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:40,171 INFO L93 Difference]: Finished difference Result 44 states and 71 transitions. [2021-10-24 10:28:40,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) Word has length 4 [2021-10-24 10:28:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:40,184 INFO L225 Difference]: With dead ends: 44 [2021-10-24 10:28:40,185 INFO L226 Difference]: Without dead ends: 23 [2021-10-24 10:28:40,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:28:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-24 10:28:40,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-24 10:28:40,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 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) [2021-10-24 10:28:40,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-10-24 10:28:40,229 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 4 [2021-10-24 10:28:40,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:40,230 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-10-24 10:28:40,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 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) [2021-10-24 10:28:40,231 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-10-24 10:28:40,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-24 10:28:40,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:40,232 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-24 10:28:40,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:28:40,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash 774639768, now seen corresponding path program 1 times [2021-10-24 10:28:40,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:40,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279031739] [2021-10-24 10:28:40,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:40,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:40,298 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:40,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279031739] [2021-10-24 10:28:40,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279031739] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:40,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752170349] [2021-10-24 10:28:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:40,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:40,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:40,306 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:40,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-24 10:28:40,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:40,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-24 10:28:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:40,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:40,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-24 10:28:40,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752170349] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:40,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:28:40,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3, 3] total 4 [2021-10-24 10:28:40,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135764387] [2021-10-24 10:28:40,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:28:40,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:40,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:28:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:28:40,596 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 10:28:40,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:40,660 INFO L93 Difference]: Finished difference Result 39 states and 53 transitions. [2021-10-24 10:28:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:40,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 7 [2021-10-24 10:28:40,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:40,662 INFO L225 Difference]: With dead ends: 39 [2021-10-24 10:28:40,662 INFO L226 Difference]: Without dead ends: 37 [2021-10-24 10:28:40,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-24 10:28:40,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-24 10:28:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-10-24 10:28:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 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) [2021-10-24 10:28:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-10-24 10:28:40,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 7 [2021-10-24 10:28:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:40,711 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-10-24 10:28:40,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-10-24 10:28:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-10-24 10:28:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-24 10:28:40,712 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:40,713 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:28:40,752 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-24 10:28:40,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:40,941 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:40,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1418683263, now seen corresponding path program 1 times [2021-10-24 10:28:40,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:40,943 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842552229] [2021-10-24 10:28:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:40,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:40,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:41,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:41,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:41,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842552229] [2021-10-24 10:28:41,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842552229] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:41,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66194602] [2021-10-24 10:28:41,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:41,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:41,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:41,066 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:41,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-24 10:28:41,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:41,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-24 10:28:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:41,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:41,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:41,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66194602] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:41,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-10-24 10:28:41,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4] total 5 [2021-10-24 10:28:41,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291757058] [2021-10-24 10:28:41,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:28:41,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:41,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:28:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:28:41,380 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-24 10:28:41,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:41,444 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2021-10-24 10:28:41,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:41,445 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) Word has length 13 [2021-10-24 10:28:41,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:41,447 INFO L225 Difference]: With dead ends: 49 [2021-10-24 10:28:41,447 INFO L226 Difference]: Without dead ends: 47 [2021-10-24 10:28:41,448 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:28:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-24 10:28:41,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2021-10-24 10:28:41,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 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) [2021-10-24 10:28:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2021-10-24 10:28:41,468 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 13 [2021-10-24 10:28:41,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:41,469 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2021-10-24 10:28:41,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-10-24 10:28:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2021-10-24 10:28:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-24 10:28:41,472 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:41,473 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:28:41,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-24 10:28:41,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-24 10:28:41,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:41,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1848229620, now seen corresponding path program 1 times [2021-10-24 10:28:41,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:41,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40950987] [2021-10-24 10:28:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:41,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:41,773 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:41,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40950987] [2021-10-24 10:28:41,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40950987] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:41,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:28:41,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-24 10:28:41,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245561341] [2021-10-24 10:28:41,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:28:41,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:28:41,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:28:41,777 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-10-24 10:28:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:41,861 INFO L93 Difference]: Finished difference Result 101 states and 145 transitions. [2021-10-24 10:28:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) Word has length 15 [2021-10-24 10:28:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:41,864 INFO L225 Difference]: With dead ends: 101 [2021-10-24 10:28:41,866 INFO L226 Difference]: Without dead ends: 39 [2021-10-24 10:28:41,868 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:28:41,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-24 10:28:41,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-24 10:28:41,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-10-24 10:28:41,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2021-10-24 10:28:41,878 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 15 [2021-10-24 10:28:41,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:41,878 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2021-10-24 10:28:41,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2021-10-24 10:28:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2021-10-24 10:28:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-24 10:28:41,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:41,880 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:28:41,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:28:41,881 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:41,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1641012443, now seen corresponding path program 1 times [2021-10-24 10:28:41,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:41,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935659127] [2021-10-24 10:28:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:41,883 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:28:41,940 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:41,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935659127] [2021-10-24 10:28:41,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935659127] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:41,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214251917] [2021-10-24 10:28:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:41,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:41,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:41,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:41,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-24 10:28:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-24 10:28:42,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:42,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:42,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214251917] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:42,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:42,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 7 [2021-10-24 10:28:42,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719191666] [2021-10-24 10:28:42,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-24 10:28:42,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:42,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-24 10:28:42,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:28:42,233 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-10-24 10:28:42,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:42,273 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2021-10-24 10:28:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) Word has length 21 [2021-10-24 10:28:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:42,275 INFO L225 Difference]: With dead ends: 69 [2021-10-24 10:28:42,275 INFO L226 Difference]: Without dead ends: 45 [2021-10-24 10:28:42,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-10-24 10:28:42,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-24 10:28:42,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-24 10:28:42,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 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) [2021-10-24 10:28:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-24 10:28:42,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 21 [2021-10-24 10:28:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:42,286 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-24 10:28:42,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-10-24 10:28:42,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-24 10:28:42,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-24 10:28:42,288 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:28:42,288 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-24 10:28:42,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:42,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:42,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-24 10:28:42,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:28:42,510 INFO L82 PathProgramCache]: Analyzing trace with hash -257870307, now seen corresponding path program 1 times [2021-10-24 10:28:42,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:28:42,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848315526] [2021-10-24 10:28:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:42,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:28:42,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:42,611 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-24 10:28:42,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:28:42,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848315526] [2021-10-24 10:28:42,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848315526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-24 10:28:42,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299920140] [2021-10-24 10:28:42,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:28:42,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:42,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:28:42,615 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-24 10:28:42,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-24 10:28:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:28:42,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-24 10:28:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-24 10:28:42,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:42,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-24 10:28:42,916 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-24 10:28:42,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299920140] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-24 10:28:42,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-24 10:28:42,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-24 10:28:42,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292865870] [2021-10-24 10:28:42,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:28:42,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:28:42,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:28:42,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:28:42,922 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-24 10:28:42,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:28:42,943 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2021-10-24 10:28:42,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:28:42,947 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) Word has length 27 [2021-10-24 10:28:42,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:28:42,947 INFO L225 Difference]: With dead ends: 69 [2021-10-24 10:28:42,948 INFO L226 Difference]: Without dead ends: 0 [2021-10-24 10:28:42,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-24 10:28:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-24 10:28:42,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-24 10:28:42,955 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) [2021-10-24 10:28:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-24 10:28:42,956 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-10-24 10:28:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:28:42,956 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-24 10:28:42,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 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) [2021-10-24 10:28:42,957 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-24 10:28:42,957 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-24 10:28:42,961 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-24 10:28:43,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-24 10:28:43,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-24 10:28:43,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-24 10:28:43,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,208 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,216 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,227 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,228 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-24 10:28:43,414 INFO L857 garLoopResultBuilder]: For program point L89-1(lines 65 118) no Hoare annotation was computed. [2021-10-24 10:28:43,415 INFO L860 garLoopResultBuilder]: At program point L151(lines 20 152) the Hoare annotation is: true [2021-10-24 10:28:43,415 INFO L853 garLoopResultBuilder]: At program point L36(lines 36 139) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2021-10-24 10:28:43,416 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-24 10:28:43,416 INFO L853 garLoopResultBuilder]: At program point L61(lines 61 120) the Hoare annotation is: (or (< ULTIMATE.start_main_~blastFlag~0 5) (and (<= 8640 ULTIMATE.start_main_~s__state~0) (<= ULTIMATE.start_main_~s__state~0 8640))) [2021-10-24 10:28:43,416 INFO L853 garLoopResultBuilder]: At program point L57(lines 57 122) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2021-10-24 10:28:43,417 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 150) no Hoare annotation was computed. [2021-10-24 10:28:43,417 INFO L860 garLoopResultBuilder]: At program point L148(lines 20 152) the Hoare annotation is: true [2021-10-24 10:28:43,417 INFO L853 garLoopResultBuilder]: At program point L111(lines 29 146) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2021-10-24 10:28:43,418 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 109) no Hoare annotation was computed. [2021-10-24 10:28:43,418 INFO L853 garLoopResultBuilder]: At program point L41(lines 41 136) the Hoare annotation is: (let ((.cse0 (<= 8640 ULTIMATE.start_main_~s__state~0))) (or (and .cse0 (not (= ULTIMATE.start_main_~s__hit~0 0)) (<= ULTIMATE.start_main_~s__state~0 8640)) (<= ULTIMATE.start_main_~blastFlag~0 2) (and (< ULTIMATE.start_main_~blastFlag~0 5) .cse0))) [2021-10-24 10:28:43,418 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-24 10:28:43,418 INFO L853 garLoopResultBuilder]: At program point L108(lines 20 152) the Hoare annotation is: false [2021-10-24 10:28:43,419 INFO L857 garLoopResultBuilder]: For program point L104-1(lines 65 118) no Hoare annotation was computed. [2021-10-24 10:28:43,419 INFO L857 garLoopResultBuilder]: For program point L100-1(lines 65 118) no Hoare annotation was computed. [2021-10-24 10:28:43,419 INFO L857 garLoopResultBuilder]: For program point L30(line 30) no Hoare annotation was computed. [2021-10-24 10:28:43,425 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:28:43,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:28:43 BoogieIcfgContainer [2021-10-24 10:28:43,445 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:28:43,446 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:28:43,446 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:28:43,446 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:28:43,447 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:28:39" (3/4) ... [2021-10-24 10:28:43,451 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-24 10:28:43,464 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-24 10:28:43,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-24 10:28:43,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:28:43,465 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-24 10:28:43,522 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:28:43,522 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:28:43,524 INFO L168 Benchmark]: Toolchain (without parser) took 4763.24 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 70.0 MB in the beginning and 83.2 MB in the end (delta: -13.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,524 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory was 75.3 MB in the beginning and 75.3 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:28:43,525 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.34 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 81.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,525 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,526 INFO L168 Benchmark]: Boogie Preprocessor took 26.77 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:28:43,526 INFO L168 Benchmark]: RCFGBuilder took 545.33 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 65.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,527 INFO L168 Benchmark]: TraceAbstraction took 3746.60 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 65.1 MB in the beginning and 86.3 MB in the end (delta: -21.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,528 INFO L168 Benchmark]: Witness Printer took 76.44 ms. Allocated memory is still 134.2 MB. Free memory was 86.3 MB in the beginning and 83.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-24 10:28:43,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 104.9 MB. Free memory was 75.3 MB in the beginning and 75.3 MB in the end (delta: 25.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 317.34 ms. Allocated memory is still 104.9 MB. Free memory was 69.8 MB in the beginning and 81.8 MB in the end (delta: -12.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.80 ms. Allocated memory is still 104.9 MB. Free memory was 81.3 MB in the beginning and 80.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.77 ms. Allocated memory is still 104.9 MB. Free memory was 80.2 MB in the beginning and 79.2 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 545.33 ms. Allocated memory is still 104.9 MB. Free memory was 79.1 MB in the beginning and 65.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3746.60 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 65.1 MB in the beginning and 86.3 MB in the end (delta: -21.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 16.1 GB. * Witness Printer took 76.44 ms. Allocated memory is still 134.2 MB. Free memory was 86.3 MB in the beginning and 83.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 150]: 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 1 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3615.3ms, OverallIterations: 6, TraceHistogramMax: 4, EmptinessCheckTime: 21.9ms, AutomataDifference: 416.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 225.2ms, InitialAbstractionConstructionTime: 16.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 94 SDtfs, 34 SDslu, 47 SDs, 0 SdLazy, 75 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 154.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=3, InterpolantAutomatonStates: 18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 109.9ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 8 PreInvPairs, 48 NumberOfFragments, 102 HoareAnnotationTreeSize, 8 FomulaSimplifications, 396 FormulaSimplificationTreeSizeReduction, 58.4ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 26 FormulaSimplificationTreeSizeReductionInter, 158.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 46.1ms SsaConstructionTime, 233.2ms SatisfiabilityAnalysisTime, 1193.7ms InterpolantComputationTime, 155 NumberOfCodeBlocks, 155 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 209 ConstructedInterpolants, 0 QuantifiedInterpolants, 413 SizeOfPredicates, 0 NumberOfNonLiveVariables, 253 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 123/139 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: 41]: Loop Invariant Derived loop invariant: (((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640) || blastFlag <= 2) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 61]: Loop Invariant Derived loop invariant: blastFlag < 5 || (8640 <= s__state && s__state <= 8640) - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: (((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640) || blastFlag <= 2) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: (((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640) || blastFlag <= 2) || (blastFlag < 5 && 8640 <= s__state) - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (((8640 <= s__state && !(s__hit == 0)) && s__state <= 8640) || blastFlag <= 2) || (blastFlag < 5 && 8640 <= s__state) RESULT: Ultimate proved your program to be correct! [2021-10-24 10:28:43,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b1eda3b4-bd76-4036-a9bd-822dd812ae47/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...