./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs --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 9b662101800a9cac954243c459de117719237e24 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:50:17,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:50:17,965 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:50:18,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:50:18,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:50:18,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:50:18,019 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:50:18,024 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:50:18,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:50:18,033 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:50:18,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:50:18,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:50:18,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:50:18,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:50:18,043 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:50:18,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:50:18,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:50:18,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:50:18,058 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:50:18,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:50:18,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:50:18,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:50:18,075 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:50:18,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:50:18,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:50:18,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:50:18,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:50:18,090 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:50:18,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:50:18,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:50:18,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:50:18,096 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:50:18,098 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:50:18,099 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:50:18,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:50:18,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:50:18,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:50:18,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:50:18,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:50:18,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:50:18,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:50:18,107 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:50:18,152 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:50:18,152 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:50:18,153 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:50:18,154 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:50:18,154 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:50:18,154 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:50:18,154 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:50:18,155 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:50:18,155 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:50:18,155 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:50:18,155 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:50:18,156 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:50:18,156 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:50:18,156 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:50:18,157 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:50:18,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:50:18,158 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:50:18,158 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:50:18,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:50:18,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:50:18,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:50:18,159 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:50:18,159 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:50:18,160 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:50:18,160 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:50:18,160 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:50:18,160 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:50:18,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:50:18,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:50:18,161 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:50:18,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:18,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:50:18,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:50:18,162 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:50:18,163 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:50:18,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:50:18,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:50:18,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:50:18,164 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:50:18,164 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_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b662101800a9cac954243c459de117719237e24 [2021-10-16 02:50:18,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:50:18,469 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:50:18,473 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:50:18,474 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:50:18,475 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:50:18,476 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2021-10-16 02:50:18,557 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/data/5f7fc9fb1/169a1ea048a842e4811fa90d29cace6b/FLAG5c8086946 [2021-10-16 02:50:19,179 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:50:19,179 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/sv-benchmarks/c/eca-rers2012/Problem01_label51.c [2021-10-16 02:50:19,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/data/5f7fc9fb1/169a1ea048a842e4811fa90d29cace6b/FLAG5c8086946 [2021-10-16 02:50:19,411 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/data/5f7fc9fb1/169a1ea048a842e4811fa90d29cace6b [2021-10-16 02:50:19,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:50:19,415 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:50:19,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:19,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:50:19,420 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:50:19,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:19" (1/1) ... [2021-10-16 02:50:19,422 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534295f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:19, skipping insertion in model container [2021-10-16 02:50:19,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:50:19" (1/1) ... [2021-10-16 02:50:19,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:50:19,471 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:50:19,884 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_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/sv-benchmarks/c/eca-rers2012/Problem01_label51.c[18730,18743] [2021-10-16 02:50:19,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:19,936 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:50:20,016 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_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/sv-benchmarks/c/eca-rers2012/Problem01_label51.c[18730,18743] [2021-10-16 02:50:20,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:50:20,042 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:50:20,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20 WrapperNode [2021-10-16 02:50:20,043 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:50:20,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:20,044 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:50:20,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:50:20,056 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,081 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:50:20,147 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:50:20,147 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:50:20,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:50:20,156 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,156 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:50:20,208 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:50:20,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:50:20,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:50:20,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (1/1) ... [2021-10-16 02:50:20,217 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:50:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:20,263 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:50:20,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:50:20,334 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:50:20,335 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:50:20,336 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:50:20,337 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:50:22,408 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:50:22,408 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:50:22,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:22 BoogieIcfgContainer [2021-10-16 02:50:22,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:50:22,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:50:22,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:50:22,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:50:22,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:50:19" (1/3) ... [2021-10-16 02:50:22,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9ea2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:22, skipping insertion in model container [2021-10-16 02:50:22,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:50:20" (2/3) ... [2021-10-16 02:50:22,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9ea2a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:50:22, skipping insertion in model container [2021-10-16 02:50:22,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:22" (3/3) ... [2021-10-16 02:50:22,423 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label51.c [2021-10-16 02:50:22,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:50:22,434 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:50:22,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:50:22,504 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, mConcurrency=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 [2021-10-16 02:50:22,504 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:50:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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) [2021-10-16 02:50:22,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-16 02:50:22,532 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:22,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:22,533 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 379023495, now seen corresponding path program 1 times [2021-10-16 02:50:22,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:22,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387701013] [2021-10-16 02:50:22,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:22,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:22,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:23,057 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:23,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387701013] [2021-10-16 02:50:23,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387701013] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:23,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:23,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:50:23,068 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913794919] [2021-10-16 02:50:23,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:23,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:23,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:23,097 INFO L87 Difference]: Start difference. First operand has 76 states, 74 states have (on average 1.945945945945946) internal successors, (144), 75 states have internal predecessors, (144), 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 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-16 02:50:23,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:23,537 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-16 02:50:23,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:23,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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 71 [2021-10-16 02:50:23,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:23,563 INFO L225 Difference]: With dead ends: 224 [2021-10-16 02:50:23,564 INFO L226 Difference]: Without dead ends: 145 [2021-10-16 02:50:23,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:23,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-16 02:50:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-16 02:50:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.7986111111111112) internal successors, (259), 144 states have internal predecessors, (259), 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) [2021-10-16 02:50:23,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-16 02:50:23,643 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-16 02:50:23,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:23,644 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-16 02:50:23,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 2 states have internal predecessors, (71), 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) [2021-10-16 02:50:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-16 02:50:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-16 02:50:23,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:23,649 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:23,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:50:23,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:23,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:23,650 INFO L82 PathProgramCache]: Analyzing trace with hash -615338214, now seen corresponding path program 1 times [2021-10-16 02:50:23,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:23,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887631007] [2021-10-16 02:50:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:23,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:23,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:23,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:23,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887631007] [2021-10-16 02:50:23,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887631007] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:23,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:23,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:50:23,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392368757] [2021-10-16 02:50:23,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:23,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:23,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:23,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:23,703 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-16 02:50:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:24,093 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-16 02:50:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 77 [2021-10-16 02:50:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:24,096 INFO L225 Difference]: With dead ends: 431 [2021-10-16 02:50:24,097 INFO L226 Difference]: Without dead ends: 287 [2021-10-16 02:50:24,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-16 02:50:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-16 02:50:24,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.6363636363636365) internal successors, (468), 286 states have internal predecessors, (468), 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) [2021-10-16 02:50:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-10-16 02:50:24,119 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-10-16 02:50:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:24,119 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-10-16 02:50:24,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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) [2021-10-16 02:50:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-10-16 02:50:24,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-16 02:50:24,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:24,125 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:24,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 02:50:24,125 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1583655814, now seen corresponding path program 1 times [2021-10-16 02:50:24,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:24,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11660066] [2021-10-16 02:50:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:24,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:24,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:24,320 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:24,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11660066] [2021-10-16 02:50:24,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11660066] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:24,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:24,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:24,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468489127] [2021-10-16 02:50:24,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:24,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:24,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:24,324 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-16 02:50:24,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:24,802 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2021-10-16 02:50:24,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:24,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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 78 [2021-10-16 02:50:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:24,806 INFO L225 Difference]: With dead ends: 784 [2021-10-16 02:50:24,806 INFO L226 Difference]: Without dead ends: 429 [2021-10-16 02:50:24,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:24,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-16 02:50:24,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 358. [2021-10-16 02:50:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.350140056022409) internal successors, (482), 357 states have internal predecessors, (482), 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) [2021-10-16 02:50:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 482 transitions. [2021-10-16 02:50:24,830 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 482 transitions. Word has length 78 [2021-10-16 02:50:24,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:24,830 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 482 transitions. [2021-10-16 02:50:24,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 3 states have internal predecessors, (78), 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) [2021-10-16 02:50:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 482 transitions. [2021-10-16 02:50:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-16 02:50:24,834 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:24,834 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:24,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 02:50:24,835 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:24,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:24,839 INFO L82 PathProgramCache]: Analyzing trace with hash -2090520904, now seen corresponding path program 1 times [2021-10-16 02:50:24,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:24,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137165996] [2021-10-16 02:50:24,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:24,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:24,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:50:24,944 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:24,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137165996] [2021-10-16 02:50:24,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137165996] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:24,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:24,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 02:50:24,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130946764] [2021-10-16 02:50:24,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:24,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:24,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:24,947 INFO L87 Difference]: Start difference. First operand 358 states and 482 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2021-10-16 02:50:25,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:25,197 INFO L93 Difference]: Finished difference Result 786 states and 1062 transitions. [2021-10-16 02:50:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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 86 [2021-10-16 02:50:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:25,203 INFO L225 Difference]: With dead ends: 786 [2021-10-16 02:50:25,203 INFO L226 Difference]: Without dead ends: 429 [2021-10-16 02:50:25,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-16 02:50:25,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-10-16 02:50:25,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 1.3200934579439252) internal successors, (565), 428 states have internal predecessors, (565), 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) [2021-10-16 02:50:25,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 565 transitions. [2021-10-16 02:50:25,230 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 565 transitions. Word has length 86 [2021-10-16 02:50:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:25,230 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 565 transitions. [2021-10-16 02:50:25,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 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) [2021-10-16 02:50:25,231 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 565 transitions. [2021-10-16 02:50:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-16 02:50:25,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:25,234 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:25,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 02:50:25,234 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:25,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:25,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1999069766, now seen corresponding path program 1 times [2021-10-16 02:50:25,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:25,236 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675561655] [2021-10-16 02:50:25,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:25,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-16 02:50:25,303 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:25,303 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675561655] [2021-10-16 02:50:25,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675561655] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:25,304 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:25,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:25,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091668363] [2021-10-16 02:50:25,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:25,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:25,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:25,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:25,307 INFO L87 Difference]: Start difference. First operand 429 states and 565 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-16 02:50:25,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:25,592 INFO L93 Difference]: Finished difference Result 1212 states and 1574 transitions. [2021-10-16 02:50:25,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:25,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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 95 [2021-10-16 02:50:25,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:25,601 INFO L225 Difference]: With dead ends: 1212 [2021-10-16 02:50:25,601 INFO L226 Difference]: Without dead ends: 784 [2021-10-16 02:50:25,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:25,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-16 02:50:25,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 571. [2021-10-16 02:50:25,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.305263157894737) internal successors, (744), 570 states have internal predecessors, (744), 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) [2021-10-16 02:50:25,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 744 transitions. [2021-10-16 02:50:25,624 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 744 transitions. Word has length 95 [2021-10-16 02:50:25,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:25,625 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 744 transitions. [2021-10-16 02:50:25,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 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) [2021-10-16 02:50:25,625 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 744 transitions. [2021-10-16 02:50:25,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-16 02:50:25,627 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:25,628 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:25,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-16 02:50:25,628 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:25,629 INFO L82 PathProgramCache]: Analyzing trace with hash 812559337, now seen corresponding path program 1 times [2021-10-16 02:50:25,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:25,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376799676] [2021-10-16 02:50:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:25,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:50:25,686 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:25,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376799676] [2021-10-16 02:50:25,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376799676] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:25,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:25,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:25,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889051862] [2021-10-16 02:50:25,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:25,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:25,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:25,689 INFO L87 Difference]: Start difference. First operand 571 states and 744 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-10-16 02:50:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:25,972 INFO L93 Difference]: Finished difference Result 1354 states and 1750 transitions. [2021-10-16 02:50:25,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:25,973 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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 101 [2021-10-16 02:50:25,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:25,978 INFO L225 Difference]: With dead ends: 1354 [2021-10-16 02:50:25,979 INFO L226 Difference]: Without dead ends: 784 [2021-10-16 02:50:25,980 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:25,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-10-16 02:50:26,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 713. [2021-10-16 02:50:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 1.2808988764044944) internal successors, (912), 712 states have internal predecessors, (912), 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) [2021-10-16 02:50:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 912 transitions. [2021-10-16 02:50:26,019 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 912 transitions. Word has length 101 [2021-10-16 02:50:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:26,020 INFO L470 AbstractCegarLoop]: Abstraction has 713 states and 912 transitions. [2021-10-16 02:50:26,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 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) [2021-10-16 02:50:26,021 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 912 transitions. [2021-10-16 02:50:26,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-16 02:50:26,024 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:26,024 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:26,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-16 02:50:26,024 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:26,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:26,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1324202924, now seen corresponding path program 1 times [2021-10-16 02:50:26,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:26,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706469072] [2021-10-16 02:50:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:26,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:26,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:50:26,130 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:26,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706469072] [2021-10-16 02:50:26,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706469072] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:26,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:26,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:26,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274625493] [2021-10-16 02:50:26,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:26,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:26,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:26,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:26,133 INFO L87 Difference]: Start difference. First operand 713 states and 912 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-16 02:50:26,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:26,606 INFO L93 Difference]: Finished difference Result 1993 states and 2604 transitions. [2021-10-16 02:50:26,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:26,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 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 115 [2021-10-16 02:50:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:26,616 INFO L225 Difference]: With dead ends: 1993 [2021-10-16 02:50:26,616 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:50:26,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:26,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:50:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 1068. [2021-10-16 02:50:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.2352389878163075) internal successors, (1318), 1067 states have internal predecessors, (1318), 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) [2021-10-16 02:50:26,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1318 transitions. [2021-10-16 02:50:26,652 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1318 transitions. Word has length 115 [2021-10-16 02:50:26,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:26,653 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1318 transitions. [2021-10-16 02:50:26,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 3 states have internal predecessors, (113), 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) [2021-10-16 02:50:26,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1318 transitions. [2021-10-16 02:50:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-10-16 02:50:26,657 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:26,657 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:26,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-16 02:50:26,658 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:26,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:26,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1469590598, now seen corresponding path program 1 times [2021-10-16 02:50:26,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:26,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614440951] [2021-10-16 02:50:26,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:26,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:50:26,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:26,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614440951] [2021-10-16 02:50:26,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614440951] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:26,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:50:26,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269871026] [2021-10-16 02:50:26,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:26,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:26,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:26,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:26,767 INFO L87 Difference]: Start difference. First operand 1068 states and 1318 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-10-16 02:50:27,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:27,062 INFO L93 Difference]: Finished difference Result 2206 states and 2737 transitions. [2021-10-16 02:50:27,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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 118 [2021-10-16 02:50:27,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:27,070 INFO L225 Difference]: With dead ends: 2206 [2021-10-16 02:50:27,071 INFO L226 Difference]: Without dead ends: 1139 [2021-10-16 02:50:27,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 02:50:27,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-16 02:50:27,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2021-10-16 02:50:27,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1068 states, 1067 states have (on average 1.2408622305529522) internal successors, (1324), 1067 states have internal predecessors, (1324), 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) [2021-10-16 02:50:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1324 transitions. [2021-10-16 02:50:27,130 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1324 transitions. Word has length 118 [2021-10-16 02:50:27,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:27,131 INFO L470 AbstractCegarLoop]: Abstraction has 1068 states and 1324 transitions. [2021-10-16 02:50:27,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 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) [2021-10-16 02:50:27,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1324 transitions. [2021-10-16 02:50:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-10-16 02:50:27,135 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:27,135 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:27,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-16 02:50:27,136 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:27,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:27,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1087700905, now seen corresponding path program 1 times [2021-10-16 02:50:27,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:27,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801449855] [2021-10-16 02:50:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:27,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:50:27,273 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:27,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801449855] [2021-10-16 02:50:27,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801449855] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:27,274 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:50:27,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-16 02:50:27,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905807639] [2021-10-16 02:50:27,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:50:27,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:27,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:50:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:27,280 INFO L87 Difference]: Start difference. First operand 1068 states and 1324 transitions. Second operand has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-10-16 02:50:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:27,791 INFO L93 Difference]: Finished difference Result 2277 states and 2799 transitions. [2021-10-16 02:50:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:50:27,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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 132 [2021-10-16 02:50:27,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:27,800 INFO L225 Difference]: With dead ends: 2277 [2021-10-16 02:50:27,800 INFO L226 Difference]: Without dead ends: 1210 [2021-10-16 02:50:27,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:50:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1210 states. [2021-10-16 02:50:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1210 to 997. [2021-10-16 02:50:27,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1967871485943775) internal successors, (1192), 996 states have internal predecessors, (1192), 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) [2021-10-16 02:50:27,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1192 transitions. [2021-10-16 02:50:27,851 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1192 transitions. Word has length 132 [2021-10-16 02:50:27,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:27,852 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1192 transitions. [2021-10-16 02:50:27,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.0) internal successors, (132), 4 states have internal predecessors, (132), 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) [2021-10-16 02:50:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1192 transitions. [2021-10-16 02:50:27,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-16 02:50:27,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:27,857 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:27,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-16 02:50:27,858 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:27,859 INFO L82 PathProgramCache]: Analyzing trace with hash 2104898048, now seen corresponding path program 1 times [2021-10-16 02:50:27,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:27,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114076570] [2021-10-16 02:50:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:27,861 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:28,070 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 124 proven. 67 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-16 02:50:28,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:28,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114076570] [2021-10-16 02:50:28,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114076570] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:50:28,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583557846] [2021-10-16 02:50:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:28,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:28,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:28,074 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:28,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:50:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:50:28,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-16 02:50:28,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-16 02:50:29,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583557846] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:29,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:50:29,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2021-10-16 02:50:29,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685310889] [2021-10-16 02:50:29,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:29,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:29,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:29,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:50:29,340 INFO L87 Difference]: Start difference. First operand 997 states and 1192 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-16 02:50:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:29,646 INFO L93 Difference]: Finished difference Result 2206 states and 2612 transitions. [2021-10-16 02:50:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 197 [2021-10-16 02:50:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:29,653 INFO L225 Difference]: With dead ends: 2206 [2021-10-16 02:50:29,654 INFO L226 Difference]: Without dead ends: 997 [2021-10-16 02:50:29,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 393 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 02:50:29,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-10-16 02:50:29,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 997. [2021-10-16 02:50:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 1.1495983935742973) internal successors, (1145), 996 states have internal predecessors, (1145), 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) [2021-10-16 02:50:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 1145 transitions. [2021-10-16 02:50:29,688 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 1145 transitions. Word has length 197 [2021-10-16 02:50:29,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:29,689 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 1145 transitions. [2021-10-16 02:50:29,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-16 02:50:29,690 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 1145 transitions. [2021-10-16 02:50:29,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-16 02:50:29,694 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:50:29,695 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:50:29,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:29,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-16 02:50:29,909 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:50:29,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:50:29,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1502816078, now seen corresponding path program 1 times [2021-10-16 02:50:29,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:50:29,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799119679] [2021-10-16 02:50:29,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:29,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:50:29,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-16 02:50:30,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:50:30,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799119679] [2021-10-16 02:50:30,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799119679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:50:30,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389669922] [2021-10-16 02:50:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:50:30,179 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:30,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:50:30,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:50:30,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:50:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:50:30,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:50:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:50:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-16 02:50:31,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:50:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-16 02:50:31,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389669922] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:50:31,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 02:50:31,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-16 02:50:31,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092621988] [2021-10-16 02:50:31,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 02:50:31,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:50:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 02:50:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:50:31,682 INFO L87 Difference]: Start difference. First operand 997 states and 1145 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-16 02:50:31,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:50:31,926 INFO L93 Difference]: Finished difference Result 2062 states and 2380 transitions. [2021-10-16 02:50:31,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:50:31,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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 216 [2021-10-16 02:50:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:50:31,928 INFO L225 Difference]: With dead ends: 2062 [2021-10-16 02:50:31,928 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:50:31,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 431 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:50:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:50:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:50:31,930 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) [2021-10-16 02:50:31,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:50:31,931 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2021-10-16 02:50:31,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:50:31,931 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:50:31,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 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) [2021-10-16 02:50:31,932 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:50:31,932 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:50:31,934 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:50:31,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:50:32,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:50:32,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:50:32,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:32,175 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:32,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:50:32,407 INFO L857 garLoopResultBuilder]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-16 02:50:32,407 INFO L857 garLoopResultBuilder]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L500-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-16 02:50:32,408 INFO L857 garLoopResultBuilder]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-16 02:50:32,409 INFO L857 garLoopResultBuilder]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-16 02:50:32,409 INFO L857 garLoopResultBuilder]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-16 02:50:32,409 INFO L857 garLoopResultBuilder]: For program point L503-1(lines 40 585) no Hoare annotation was computed. [2021-10-16 02:50:32,409 INFO L857 garLoopResultBuilder]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L504(line 504) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-16 02:50:32,410 INFO L857 garLoopResultBuilder]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-16 02:50:32,411 INFO L857 garLoopResultBuilder]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-16 02:50:32,411 INFO L857 garLoopResultBuilder]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-16 02:50:32,411 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-16 02:50:32,411 INFO L857 garLoopResultBuilder]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-16 02:50:32,412 INFO L857 garLoopResultBuilder]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-16 02:50:32,412 INFO L857 garLoopResultBuilder]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-16 02:50:32,412 INFO L857 garLoopResultBuilder]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-16 02:50:32,414 INFO L857 garLoopResultBuilder]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-16 02:50:32,415 INFO L857 garLoopResultBuilder]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-16 02:50:32,416 INFO L857 garLoopResultBuilder]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-16 02:50:32,416 INFO L857 garLoopResultBuilder]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-16 02:50:32,416 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:50:32,417 INFO L857 garLoopResultBuilder]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-16 02:50:32,417 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-16 02:50:32,418 INFO L857 garLoopResultBuilder]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-16 02:50:32,418 INFO L853 garLoopResultBuilder]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse4 (<= ~a8~0 13)) (.cse2 (= ~a7~0 1)) (.cse1 (= ~a20~0 1)) (.cse0 (= ~a21~0 1)) (.cse3 (<= ~a16~0 5))) (or (and (= ~a12~0 8) .cse0 (= ~a17~0 1) .cse1) (and .cse0 .cse2 .cse3) (and .cse4 .cse2 .cse3) (and .cse0 (<= 15 ~a8~0)) (and .cse0 (<= ~a16~0 4)) (and .cse4 .cse2 .cse1) (and (not .cse1) .cse0 .cse3))) [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-16 02:50:32,419 INFO L857 garLoopResultBuilder]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-16 02:50:32,420 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-16 02:50:32,420 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:50:32,420 INFO L857 garLoopResultBuilder]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-16 02:50:32,420 INFO L860 garLoopResultBuilder]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-16 02:50:32,420 INFO L857 garLoopResultBuilder]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-16 02:50:32,420 INFO L857 garLoopResultBuilder]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-16 02:50:32,421 INFO L857 garLoopResultBuilder]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-16 02:50:32,422 INFO L857 garLoopResultBuilder]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-16 02:50:32,422 INFO L857 garLoopResultBuilder]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-16 02:50:32,425 INFO L857 garLoopResultBuilder]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-16 02:50:32,425 INFO L857 garLoopResultBuilder]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-16 02:50:32,425 INFO L857 garLoopResultBuilder]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-16 02:50:32,425 INFO L853 garLoopResultBuilder]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse4 (<= ~a8~0 13)) (.cse2 (= ~a7~0 1)) (.cse1 (= ~a20~0 1)) (.cse0 (= ~a21~0 1)) (.cse3 (<= ~a16~0 5))) (or (and (= ~a12~0 8) .cse0 (= ~a17~0 1) .cse1) (and .cse0 .cse2 .cse3) (and .cse4 .cse2 .cse3) (and .cse0 (<= 15 ~a8~0)) (and .cse0 (<= ~a16~0 4)) (and .cse4 .cse2 .cse1) (and (not .cse1) .cse0 .cse3))) [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 504) no Hoare annotation was computed. [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-16 02:50:32,426 INFO L857 garLoopResultBuilder]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-16 02:50:32,427 INFO L857 garLoopResultBuilder]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-16 02:50:32,427 INFO L857 garLoopResultBuilder]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-16 02:50:32,431 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:50:32,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:50:32 BoogieIcfgContainer [2021-10-16 02:50:32,469 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:50:32,470 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:50:32,470 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:50:32,470 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:50:32,471 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:50:22" (3/4) ... [2021-10-16 02:50:32,477 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:50:32,504 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 107 nodes and edges [2021-10-16 02:50:32,506 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2021-10-16 02:50:32,508 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-16 02:50:32,510 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:50:32,677 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:50:32,677 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:50:32,679 INFO L168 Benchmark]: Toolchain (without parser) took 13263.01 ms. Allocated memory was 96.5 MB in the beginning and 205.5 MB in the end (delta: 109.1 MB). Free memory was 55.3 MB in the beginning and 91.4 MB in the end (delta: -36.1 MB). Peak memory consumption was 71.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,679 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:50:32,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 627.06 ms. Allocated memory is still 96.5 MB. Free memory was 55.1 MB in the beginning and 53.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,681 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.87 ms. Allocated memory is still 96.5 MB. Free memory was 53.6 MB in the beginning and 48.1 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,685 INFO L168 Benchmark]: Boogie Preprocessor took 60.54 ms. Allocated memory is still 96.5 MB. Free memory was 48.1 MB in the beginning and 43.5 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,685 INFO L168 Benchmark]: RCFGBuilder took 2203.51 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 43.5 MB in the beginning and 47.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,686 INFO L168 Benchmark]: TraceAbstraction took 10055.08 ms. Allocated memory was 123.7 MB in the beginning and 205.5 MB in the end (delta: 81.8 MB). Free memory was 46.3 MB in the beginning and 106.1 MB in the end (delta: -59.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,686 INFO L168 Benchmark]: Witness Printer took 207.19 ms. Allocated memory is still 205.5 MB. Free memory was 106.1 MB in the beginning and 91.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:50:32,688 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 96.5 MB. Free memory is still 73.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 627.06 ms. Allocated memory is still 96.5 MB. Free memory was 55.1 MB in the beginning and 53.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.87 ms. Allocated memory is still 96.5 MB. Free memory was 53.6 MB in the beginning and 48.1 MB in the end (delta: 5.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.54 ms. Allocated memory is still 96.5 MB. Free memory was 48.1 MB in the beginning and 43.5 MB in the end (delta: 4.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2203.51 ms. Allocated memory was 96.5 MB in the beginning and 123.7 MB in the end (delta: 27.3 MB). Free memory was 43.5 MB in the beginning and 47.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10055.08 ms. Allocated memory was 123.7 MB in the beginning and 205.5 MB in the end (delta: 81.8 MB). Free memory was 46.3 MB in the beginning and 106.1 MB in the end (delta: -59.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 16.1 GB. * Witness Printer took 207.19 ms. Allocated memory is still 205.5 MB. Free memory was 106.1 MB in the beginning and 91.4 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 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: 504]: 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, 76 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9933.8ms, OverallIterations: 11, TraceHistogramMax: 5, EmptinessCheckTime: 47.0ms, AutomataDifference: 4113.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 271.4ms, InitialAbstractionConstructionTime: 14.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 575 SDtfs, 690 SDslu, 51 SDs, 0 SdLazy, 2621 SolverSat, 604 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2822.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 857 GetRequests, 837 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 92.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1068occurred in iteration=7, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 351.4ms AutomataMinimizationTime, 11 MinimizatonAttempts, 781 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 47 NumberOfFragments, 139 HoareAnnotationTreeSize, 3 FomulaSimplifications, 2528 FormulaSimplificationTreeSizeReduction, 70.4ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 224 FormulaSimplificationTreeSizeReductionInter, 193.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 159.0ms SsaConstructionTime, 576.7ms SatisfiabilityAnalysisTime, 3459.8ms InterpolantComputationTime, 1699 NumberOfCodeBlocks, 1699 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 2097 ConstructedInterpolants, 0 QuantifiedInterpolants, 7157 SizeOfPredicates, 0 NumberOfNonLiveVariables, 887 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 15 InterpolantComputations, 13 PerfectInterpolantSequences, 1638/1791 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: 593]: Loop Invariant Derived loop invariant: ((((((((a12 == 8 && a21 == 1) && a17 == 1) && a20 == 1) || ((a21 == 1 && a7 == 1) && a16 <= 5)) || ((a8 <= 13 && a7 == 1) && a16 <= 5)) || (a21 == 1 && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || ((a8 <= 13 && a7 == 1) && a20 == 1)) || ((!(a20 == 1) && a21 == 1) && a16 <= 5) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((a12 == 8 && a21 == 1) && a17 == 1) && a20 == 1) || ((a21 == 1 && a7 == 1) && a16 <= 5)) || ((a8 <= 13 && a7 == 1) && a16 <= 5)) || (a21 == 1 && 15 <= a8)) || (a21 == 1 && a16 <= 4)) || ((a8 <= 13 && a7 == 1) && a20 == 1)) || ((!(a20 == 1) && a21 == 1) && a16 <= 5) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:50:32,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b26fc1a8-8450-4e9f-9ad6-4f5499af451e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...