./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw --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 e4250f34aeb1bbaa6a68e9df4c6caead053a128de9d45e1f0dae379c6394c54d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-20 06:06:05,163 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 06:06:05,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 06:06:05,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 06:06:05,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 06:06:05,249 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 06:06:05,251 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 06:06:05,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 06:06:05,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 06:06:05,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 06:06:05,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 06:06:05,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 06:06:05,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 06:06:05,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 06:06:05,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 06:06:05,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 06:06:05,285 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 06:06:05,287 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 06:06:05,290 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 06:06:05,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 06:06:05,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 06:06:05,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 06:06:05,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 06:06:05,310 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 06:06:05,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 06:06:05,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 06:06:05,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 06:06:05,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 06:06:05,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 06:06:05,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 06:06:05,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 06:06:05,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 06:06:05,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 06:06:05,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 06:06:05,338 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 06:06:05,338 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 06:06:05,339 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 06:06:05,340 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 06:06:05,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 06:06:05,342 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 06:06:05,343 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 06:06:05,344 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 06:06:05,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 06:06:05,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 06:06:05,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 06:06:05,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 06:06:05,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 06:06:05,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 06:06:05,408 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 06:06:05,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 06:06:05,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 06:06:05,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 06:06:05,418 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 06:06:05,418 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 06:06:05,419 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 06:06:05,419 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 06:06:05,420 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 06:06:05,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 06:06:05,421 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 06:06:05,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 06:06:05,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 06:06:05,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 06:06:05,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 06:06:05,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 06:06:05,423 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 06:06:05,423 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 06:06:05,423 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 06:06:05,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 06:06:05,424 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 06:06:05,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 06:06:05,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 06:06:05,427 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 06:06:05,428 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:06:05,428 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 06:06:05,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 06:06:05,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 06:06:05,429 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 06:06:05,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 06:06:05,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 06:06:05,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 06:06:05,430 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 06:06:05,431 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_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4250f34aeb1bbaa6a68e9df4c6caead053a128de9d45e1f0dae379c6394c54d [2021-10-20 06:06:05,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 06:06:05,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 06:06:05,804 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 06:06:05,806 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 06:06:05,807 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 06:06:05,808 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-20 06:06:05,895 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/data/dc87e21e9/6c0d05405ad947c69ef3bf67d6f0230f/FLAG08b783347 [2021-10-20 06:06:06,622 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 06:06:06,623 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c [2021-10-20 06:06:06,634 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/data/dc87e21e9/6c0d05405ad947c69ef3bf67d6f0230f/FLAG08b783347 [2021-10-20 06:06:06,945 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/data/dc87e21e9/6c0d05405ad947c69ef3bf67d6f0230f [2021-10-20 06:06:06,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 06:06:06,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 06:06:06,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 06:06:06,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 06:06:06,960 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 06:06:06,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:06:06" (1/1) ... [2021-10-20 06:06:06,963 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ec02ad2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:06, skipping insertion in model container [2021-10-20 06:06:06,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:06:06" (1/1) ... [2021-10-20 06:06:06,972 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 06:06:07,003 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 06:06:07,217 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_d40707ce-7160-451b-a175-4c4fdc0abb2b/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-20 06:06:07,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:06:07,291 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 06:06:07,304 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_d40707ce-7160-451b-a175-4c4fdc0abb2b/sv-benchmarks/c/systemc/pc_sfifo_1.cil-2.c[337,350] [2021-10-20 06:06:07,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 06:06:07,350 INFO L208 MainTranslator]: Completed translation [2021-10-20 06:06:07,351 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07 WrapperNode [2021-10-20 06:06:07,351 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 06:06:07,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 06:06:07,353 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 06:06:07,353 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 06:06:07,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,374 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,411 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 06:06:07,412 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 06:06:07,412 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 06:06:07,413 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 06:06:07,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,466 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 06:06:07,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 06:06:07,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 06:06:07,484 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 06:06:07,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (1/1) ... [2021-10-20 06:06:07,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 06:06:07,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:06:07,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 06:06:07,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 06:06:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 06:06:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 06:06:07,576 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 06:06:07,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 06:06:08,477 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 06:06:08,478 INFO L299 CfgBuilder]: Removed 42 assume(true) statements. [2021-10-20 06:06:08,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:08 BoogieIcfgContainer [2021-10-20 06:06:08,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 06:06:08,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 06:06:08,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 06:06:08,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 06:06:08,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:06:06" (1/3) ... [2021-10-20 06:06:08,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105104c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:06:08, skipping insertion in model container [2021-10-20 06:06:08,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:06:07" (2/3) ... [2021-10-20 06:06:08,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@105104c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:06:08, skipping insertion in model container [2021-10-20 06:06:08,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:08" (3/3) ... [2021-10-20 06:06:08,499 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2021-10-20 06:06:08,507 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 06:06:08,508 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-10-20 06:06:08,587 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 06:06:08,599 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 06:06:08,599 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-20 06:06:08,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 43 states have internal predecessors, (69), 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) [2021-10-20 06:06:08,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-20 06:06:08,629 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:08,630 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:08,630 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:08,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash 992082448, now seen corresponding path program 1 times [2021-10-20 06:06:08,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:08,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013846078] [2021-10-20 06:06:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:08,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:08,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:08,993 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:08,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013846078] [2021-10-20 06:06:08,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013846078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:08,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:08,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:06:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043378039] [2021-10-20 06:06:09,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:09,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:09,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,030 INFO L87 Difference]: Start difference. First operand has 44 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 43 states have internal predecessors, (69), 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 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-20 06:06:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:09,140 INFO L93 Difference]: Finished difference Result 116 states and 182 transitions. [2021-10-20 06:06:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:09,151 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-10-20 06:06:09,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:09,164 INFO L225 Difference]: With dead ends: 116 [2021-10-20 06:06:09,165 INFO L226 Difference]: Without dead ends: 69 [2021-10-20 06:06:09,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-20 06:06:09,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2021-10-20 06:06:09,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 64 states have internal predecessors, (96), 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) [2021-10-20 06:06:09,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 96 transitions. [2021-10-20 06:06:09,252 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 96 transitions. Word has length 18 [2021-10-20 06:06:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:09,253 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 96 transitions. [2021-10-20 06:06:09,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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) [2021-10-20 06:06:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 96 transitions. [2021-10-20 06:06:09,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-20 06:06:09,257 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:09,257 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:09,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 06:06:09,258 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:09,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:09,263 INFO L82 PathProgramCache]: Analyzing trace with hash -504803389, now seen corresponding path program 1 times [2021-10-20 06:06:09,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:09,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410297395] [2021-10-20 06:06:09,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:09,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:09,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:09,363 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:09,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410297395] [2021-10-20 06:06:09,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410297395] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:09,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:09,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:06:09,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803431212] [2021-10-20 06:06:09,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:09,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:09,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:09,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,369 INFO L87 Difference]: Start difference. First operand 65 states and 96 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-10-20 06:06:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:09,408 INFO L93 Difference]: Finished difference Result 188 states and 276 transitions. [2021-10-20 06:06:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:09,409 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2021-10-20 06:06:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:09,412 INFO L225 Difference]: With dead ends: 188 [2021-10-20 06:06:09,416 INFO L226 Difference]: Without dead ends: 124 [2021-10-20 06:06:09,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-20 06:06:09,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2021-10-20 06:06:09,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.4745762711864407) internal successors, (174), 119 states have internal predecessors, (174), 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) [2021-10-20 06:06:09,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 174 transitions. [2021-10-20 06:06:09,473 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 174 transitions. Word has length 19 [2021-10-20 06:06:09,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:09,475 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 174 transitions. [2021-10-20 06:06:09,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 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) [2021-10-20 06:06:09,476 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 174 transitions. [2021-10-20 06:06:09,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-20 06:06:09,480 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:09,480 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] [2021-10-20 06:06:09,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 06:06:09,481 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:09,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1973994324, now seen corresponding path program 1 times [2021-10-20 06:06:09,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:09,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102658735] [2021-10-20 06:06:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:09,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:09,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:09,603 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:09,603 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102658735] [2021-10-20 06:06:09,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102658735] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:09,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:09,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:06:09,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215217414] [2021-10-20 06:06:09,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:09,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:09,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:09,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,618 INFO L87 Difference]: Start difference. First operand 120 states and 174 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2021-10-20 06:06:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:09,674 INFO L93 Difference]: Finished difference Result 290 states and 424 transitions. [2021-10-20 06:06:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:09,675 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 20 [2021-10-20 06:06:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:09,680 INFO L225 Difference]: With dead ends: 290 [2021-10-20 06:06:09,681 INFO L226 Difference]: Without dead ends: 171 [2021-10-20 06:06:09,682 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 [2021-10-20 06:06:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-10-20 06:06:09,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 155. [2021-10-20 06:06:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.4705882352941178) internal successors, (225), 154 states have internal predecessors, (225), 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) [2021-10-20 06:06:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 225 transitions. [2021-10-20 06:06:09,714 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 225 transitions. Word has length 20 [2021-10-20 06:06:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:09,714 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 225 transitions. [2021-10-20 06:06:09,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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) [2021-10-20 06:06:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 225 transitions. [2021-10-20 06:06:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-20 06:06:09,729 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:09,729 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 06:06:09,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 06:06:09,729 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:09,731 INFO L82 PathProgramCache]: Analyzing trace with hash 723101864, now seen corresponding path program 1 times [2021-10-20 06:06:09,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:09,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108925988] [2021-10-20 06:06:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:09,732 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:09,868 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:09,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108925988] [2021-10-20 06:06:09,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108925988] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:09,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:09,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:06:09,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159657620] [2021-10-20 06:06:09,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:09,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,872 INFO L87 Difference]: Start difference. First operand 155 states and 225 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-20 06:06:09,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:09,913 INFO L93 Difference]: Finished difference Result 267 states and 386 transitions. [2021-10-20 06:06:09,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:09,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-10-20 06:06:09,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:09,916 INFO L225 Difference]: With dead ends: 267 [2021-10-20 06:06:09,917 INFO L226 Difference]: Without dead ends: 158 [2021-10-20 06:06:09,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:09,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-20 06:06:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 149. [2021-10-20 06:06:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.435374149659864) internal successors, (211), 148 states have internal predecessors, (211), 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) [2021-10-20 06:06:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 211 transitions. [2021-10-20 06:06:09,947 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 211 transitions. Word has length 28 [2021-10-20 06:06:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:09,948 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 211 transitions. [2021-10-20 06:06:09,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-10-20 06:06:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 211 transitions. [2021-10-20 06:06:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-20 06:06:09,949 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:09,950 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] [2021-10-20 06:06:09,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 06:06:09,950 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:09,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:09,951 INFO L82 PathProgramCache]: Analyzing trace with hash 89688681, now seen corresponding path program 1 times [2021-10-20 06:06:09,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:09,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232893410] [2021-10-20 06:06:09,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:09,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:10,040 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:10,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232893410] [2021-10-20 06:06:10,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232893410] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:10,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:10,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-20 06:06:10,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71539149] [2021-10-20 06:06:10,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:10,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:10,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:10,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:10,044 INFO L87 Difference]: Start difference. First operand 149 states and 211 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:10,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:10,088 INFO L93 Difference]: Finished difference Result 317 states and 444 transitions. [2021-10-20 06:06:10,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-10-20 06:06:10,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:10,091 INFO L225 Difference]: With dead ends: 317 [2021-10-20 06:06:10,091 INFO L226 Difference]: Without dead ends: 180 [2021-10-20 06:06:10,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-20 06:06:10,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-10-20 06:06:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 178 states have (on average 1.3820224719101124) internal successors, (246), 179 states have internal predecessors, (246), 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) [2021-10-20 06:06:10,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 246 transitions. [2021-10-20 06:06:10,133 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 246 transitions. Word has length 31 [2021-10-20 06:06:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:10,133 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 246 transitions. [2021-10-20 06:06:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 246 transitions. [2021-10-20 06:06:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-20 06:06:10,137 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:10,138 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 06:06:10,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-20 06:06:10,138 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:10,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:10,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1251489132, now seen corresponding path program 1 times [2021-10-20 06:06:10,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:10,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404980154] [2021-10-20 06:06:10,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:10,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:10,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:06:10,227 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:10,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404980154] [2021-10-20 06:06:10,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404980154] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:10,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:10,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:06:10,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291917522] [2021-10-20 06:06:10,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:10,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:10,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:10,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:10,236 INFO L87 Difference]: Start difference. First operand 180 states and 246 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:10,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:10,283 INFO L93 Difference]: Finished difference Result 333 states and 459 transitions. [2021-10-20 06:06:10,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:10,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-20 06:06:10,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:10,286 INFO L225 Difference]: With dead ends: 333 [2021-10-20 06:06:10,286 INFO L226 Difference]: Without dead ends: 178 [2021-10-20 06:06:10,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:10,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-10-20 06:06:10,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2021-10-20 06:06:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 174 states have (on average 1.3218390804597702) internal successors, (230), 175 states have internal predecessors, (230), 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) [2021-10-20 06:06:10,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2021-10-20 06:06:10,318 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 32 [2021-10-20 06:06:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:10,319 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2021-10-20 06:06:10,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 06:06:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2021-10-20 06:06:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-20 06:06:10,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:10,324 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 06:06:10,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-20 06:06:10,325 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:10,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:10,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1596314379, now seen corresponding path program 1 times [2021-10-20 06:06:10,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:10,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106716629] [2021-10-20 06:06:10,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:10,332 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:10,424 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:10,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106716629] [2021-10-20 06:06:10,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106716629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:10,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:10,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-20 06:06:10,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235630282] [2021-10-20 06:06:10,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 06:06:10,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:10,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 06:06:10,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 06:06:10,428 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-10-20 06:06:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:10,478 INFO L93 Difference]: Finished difference Result 196 states and 254 transitions. [2021-10-20 06:06:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-20 06:06:10,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 32 [2021-10-20 06:06:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:10,481 INFO L225 Difference]: With dead ends: 196 [2021-10-20 06:06:10,481 INFO L226 Difference]: Without dead ends: 194 [2021-10-20 06:06:10,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 06:06:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-10-20 06:06:10,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 174. [2021-10-20 06:06:10,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.3121387283236994) internal successors, (227), 173 states have internal predecessors, (227), 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) [2021-10-20 06:06:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 227 transitions. [2021-10-20 06:06:10,496 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 227 transitions. Word has length 32 [2021-10-20 06:06:10,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:10,499 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 227 transitions. [2021-10-20 06:06:10,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2021-10-20 06:06:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 227 transitions. [2021-10-20 06:06:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-20 06:06:10,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:10,501 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 06:06:10,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-20 06:06:10,504 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:10,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2053850234, now seen corresponding path program 1 times [2021-10-20 06:06:10,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:10,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685421284] [2021-10-20 06:06:10,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:10,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:10,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:10,665 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:10,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685421284] [2021-10-20 06:06:10,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685421284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-20 06:06:10,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040496886] [2021-10-20 06:06:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:10,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:06:10,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 06:06:10,672 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-20 06:06:10,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-20 06:06:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:10,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-20 06:06:10,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-20 06:06:11,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:11,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-20 06:06:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:11,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040496886] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-20 06:06:11,679 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [623365487] [2021-10-20 06:06:11,705 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-10-20 06:06:11,706 INFO L166 IcfgInterpreter]: Building call graph [2021-10-20 06:06:11,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-20 06:06:11,719 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-20 06:06:11,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-20 06:06:11,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,828 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:11,829 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,830 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-20 06:06:11,831 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:11,832 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,833 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-20 06:06:11,839 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 193 [2021-10-20 06:06:11,871 INFO L446 ElimStorePlain]: Different costs {0=[|v_#length_21|], 21=[|v_#valid_22|]} [2021-10-20 06:06:11,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-20 06:06:11,901 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,902 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:06:11,903 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-20 06:06:11,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-20 06:06:11,906 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:11,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-20 06:06:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-10-20 06:06:11,956 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,959 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:06:11,960 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,961 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-20 06:06:11,962 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-20 06:06:11,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:11,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,985 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:11,991 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-20 06:06:11,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-20 06:06:11,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:164, output treesize:139 [2021-10-20 06:06:12,003 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:12,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 139 [2021-10-20 06:06:12,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:12,043 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 194 [2021-10-20 06:06:12,085 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:12,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 172 [2021-10-20 06:06:12,141 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.0 percent of original size [2021-10-20 06:06:12,174 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 179 [2021-10-20 06:06:12,217 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.2 percent of original size [2021-10-20 06:06:12,235 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 207 [2021-10-20 06:06:12,263 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.4 percent of original size [2021-10-20 06:06:12,292 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-10-20 06:06:12,324 INFO L180 QuantifierPusher]: treesize reduction 4, result has 98.4 percent of original size [2021-10-20 06:06:12,338 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 237 [2021-10-20 06:06:12,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,480 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,922 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,939 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:12,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,011 INFO L180 QuantifierPusher]: treesize reduction 102, result has 55.1 percent of original size [2021-10-20 06:06:13,019 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-10-20 06:06:13,024 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,030 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 123 [2021-10-20 06:06:13,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 127 [2021-10-20 06:06:13,054 INFO L180 QuantifierPusher]: treesize reduction 4, result has 97.3 percent of original size [2021-10-20 06:06:13,063 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 129 [2021-10-20 06:06:13,074 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,080 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 159 [2021-10-20 06:06:13,099 INFO L180 QuantifierPusher]: treesize reduction 6, result has 97.0 percent of original size [2021-10-20 06:06:13,108 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 187 [2021-10-20 06:06:13,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,233 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,243 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,254 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,307 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,333 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:13,344 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 325 [2021-10-20 06:06:13,367 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:13,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,462 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 727 [2021-10-20 06:06:13,474 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:13,485 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,508 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-20 06:06:13,518 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-20 06:06:13,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 141 [2021-10-20 06:06:13,536 INFO L185 QuantifierPusher]: treesize reduction 96, result has 49.2 percent of original size 93 [2021-10-20 06:06:13,545 INFO L185 QuantifierPusher]: treesize reduction 96, result has 53.4 percent of original size 110 [2021-10-20 06:06:13,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,625 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,801 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:13,974 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:14,036 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:14,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:14,112 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:14,189 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-20 06:06:21,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-20 06:06:21,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-20 06:06:21,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2021-10-20 06:06:21,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350013239] [2021-10-20 06:06:21,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-20 06:06:21,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:21,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-20 06:06:21,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-10-20 06:06:21,592 INFO L87 Difference]: Start difference. First operand 174 states and 227 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-10-20 06:06:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:21,656 INFO L93 Difference]: Finished difference Result 431 states and 567 transitions. [2021-10-20 06:06:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-20 06:06:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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 33 [2021-10-20 06:06:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:21,661 INFO L225 Difference]: With dead ends: 431 [2021-10-20 06:06:21,661 INFO L226 Difference]: Without dead ends: 429 [2021-10-20 06:06:21,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 7438.8ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-10-20 06:06:21,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-20 06:06:21,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 303. [2021-10-20 06:06:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.3245033112582782) internal successors, (400), 302 states have internal predecessors, (400), 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) [2021-10-20 06:06:21,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 400 transitions. [2021-10-20 06:06:21,693 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 400 transitions. Word has length 33 [2021-10-20 06:06:21,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:21,694 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 400 transitions. [2021-10-20 06:06:21,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 6 states have internal predecessors, (66), 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) [2021-10-20 06:06:21,694 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 400 transitions. [2021-10-20 06:06:21,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-20 06:06:21,699 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:21,700 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-10-20 06:06:21,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-20 06:06:21,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-20 06:06:21,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:21,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:21,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1145313983, now seen corresponding path program 2 times [2021-10-20 06:06:21,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:21,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318835457] [2021-10-20 06:06:21,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:21,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:22,012 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 06:06:22,012 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:22,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318835457] [2021-10-20 06:06:22,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318835457] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:22,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:22,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:06:22,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106639559] [2021-10-20 06:06:22,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:22,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:22,017 INFO L87 Difference]: Start difference. First operand 303 states and 400 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-10-20 06:06:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:22,046 INFO L93 Difference]: Finished difference Result 507 states and 675 transitions. [2021-10-20 06:06:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:22,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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 42 [2021-10-20 06:06:22,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:22,049 INFO L225 Difference]: With dead ends: 507 [2021-10-20 06:06:22,049 INFO L226 Difference]: Without dead ends: 269 [2021-10-20 06:06:22,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-10-20 06:06:22,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 261. [2021-10-20 06:06:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.2884615384615385) internal successors, (335), 260 states have internal predecessors, (335), 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) [2021-10-20 06:06:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 335 transitions. [2021-10-20 06:06:22,070 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 335 transitions. Word has length 42 [2021-10-20 06:06:22,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:22,072 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 335 transitions. [2021-10-20 06:06:22,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2021-10-20 06:06:22,073 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 335 transitions. [2021-10-20 06:06:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-20 06:06:22,075 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 06:06:22,075 INFO L512 BasicCegarLoop]: trace histogram [3, 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] [2021-10-20 06:06:22,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-10-20 06:06:22,076 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 06:06:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 06:06:22,076 INFO L82 PathProgramCache]: Analyzing trace with hash -781769315, now seen corresponding path program 1 times [2021-10-20 06:06:22,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 06:06:22,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79507601] [2021-10-20 06:06:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 06:06:22,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 06:06:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 06:06:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-20 06:06:22,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 06:06:22,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79507601] [2021-10-20 06:06:22,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79507601] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 06:06:22,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 06:06:22,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 06:06:22,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622981589] [2021-10-20 06:06:22,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 06:06:22,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 06:06:22,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 06:06:22,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:22,138 INFO L87 Difference]: Start difference. First operand 261 states and 335 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-10-20 06:06:22,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 06:06:22,168 INFO L93 Difference]: Finished difference Result 322 states and 413 transitions. [2021-10-20 06:06:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 06:06:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 49 [2021-10-20 06:06:22,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 06:06:22,169 INFO L225 Difference]: With dead ends: 322 [2021-10-20 06:06:22,169 INFO L226 Difference]: Without dead ends: 0 [2021-10-20 06:06:22,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 06:06:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-20 06:06:22,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-20 06:06:22,171 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) [2021-10-20 06:06:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-20 06:06:22,171 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 49 [2021-10-20 06:06:22,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 06:06:22,172 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-20 06:06:22,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2021-10-20 06:06:22,172 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-20 06:06:22,172 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-20 06:06:22,175 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:06:22,176 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 06:06:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-20 06:06:22,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-20 06:06:22,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,210 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,214 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,253 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,291 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,296 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:22,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-20 06:06:23,203 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-20 06:06:23,203 INFO L860 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-10-20 06:06:23,203 INFO L857 garLoopResultBuilder]: For program point L53(lines 53 62) no Hoare annotation was computed. [2021-10-20 06:06:23,203 INFO L857 garLoopResultBuilder]: For program point L53-2(lines 53 62) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L53-3(lines 53 62) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L53-5(lines 53 62) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L268(lines 268 275) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L153(lines 152 187) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L54(lines 54 59) no Hoare annotation was computed. [2021-10-20 06:06:23,204 INFO L857 garLoopResultBuilder]: For program point L54-1(lines 54 59) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point L253(lines 253 260) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point L154-1(lines 154 164) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point L322(lines 322 326) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point L174(lines 174 186) no Hoare annotation was computed. [2021-10-20 06:06:23,205 INFO L857 garLoopResultBuilder]: For program point L141(lines 141 149) no Hoare annotation was computed. [2021-10-20 06:06:23,206 INFO L857 garLoopResultBuilder]: For program point L175(lines 175 181) no Hoare annotation was computed. [2021-10-20 06:06:23,206 INFO L853 garLoopResultBuilder]: At program point L109-1(lines 97 134) the Hoare annotation is: (let ((.cse6 (= ~q_free~0 0)) (.cse0 (= ~p_dw_pc~0 0)) (.cse1 (= ~p_num_write~0 0)) (.cse2 (= ~c_num_read~0 0)) (.cse3 (= ~p_last_write~0 ~q_buf_0~0)) (.cse4 (= ~q_free~0 1)) (.cse5 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 .cse1 .cse2 (= ~c_dr_st~0 2) .cse3 .cse4 .cse5) (and .cse0 .cse2 .cse3 .cse6 (<= ~p_num_write~0 1) (<= 1 ~p_num_write~0)) (and .cse3 (< ~c_num_read~0 ~p_num_write~0) .cse6 (= ~p_dw_pc~0 1) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse0 .cse1 .cse2 .cse3 .cse4 (= ~c_dr_pc~0 0) .cse5))) [2021-10-20 06:06:23,206 INFO L857 garLoopResultBuilder]: For program point L110(lines 109 129) no Hoare annotation was computed. [2021-10-20 06:06:23,206 INFO L857 garLoopResultBuilder]: For program point L11(line 11) no Hoare annotation was computed. [2021-10-20 06:06:23,207 INFO L857 garLoopResultBuilder]: For program point L11-1(line 11) no Hoare annotation was computed. [2021-10-20 06:06:23,207 INFO L853 garLoopResultBuilder]: At program point L144(lines 144 148) the Hoare annotation is: (and (= ~p_last_write~0 ~q_buf_0~0) (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) [2021-10-20 06:06:23,207 INFO L853 garLoopResultBuilder]: At program point L111(lines 97 134) the Hoare annotation is: (let ((.cse0 (= ~p_last_write~0 ~q_buf_0~0))) (or (and (= ~p_dw_pc~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) .cse0) (and .cse0 (<= ~p_num_write~0 ~c_num_read~0) (= ~p_dw_pc~0 1) (< ~c_num_read~0 (+ ~p_num_write~0 1))))) [2021-10-20 06:06:23,207 INFO L853 garLoopResultBuilder]: At program point L45(lines 33 47) the Hoare annotation is: (let ((.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse1 (= ~q_free~0 0))) (or (and (= ~p_dw_pc~0 0) (= ~c_num_read~0 0) .cse0 .cse1 (<= ~p_num_write~0 1) (<= 1 ~p_num_write~0)) (and .cse0 (< ~c_num_read~0 ~p_num_write~0) .cse1 (= ~p_dw_pc~0 1) (<= ~p_num_write~0 (+ ~c_num_read~0 1))))) [2021-10-20 06:06:23,208 INFO L853 garLoopResultBuilder]: At program point L45-1(lines 33 47) the Hoare annotation is: (and (= ~p_last_write~0 ~q_buf_0~0) (= ~q_free~0 1) (<= ~p_num_write~0 ~c_num_read~0) (= ~p_dw_pc~0 1) (= 2 ~p_dw_st~0) (= ~c_last_read~0 ~p_last_write~0) (< ~c_num_read~0 (+ ~p_num_write~0 1))) [2021-10-20 06:06:23,208 INFO L853 garLoopResultBuilder]: At program point L12-1(lines 140 192) the Hoare annotation is: (let ((.cse1 (= ~p_dw_pc~0 1)) (.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse2 (= ~q_free~0 1)) (.cse3 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) .cse1 (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse0 .cse2 (<= ~p_num_write~0 ~c_num_read~0) .cse1 .cse3 (< ~c_num_read~0 (+ ~p_num_write~0 1))) (and (= ~p_dw_pc~0 0) (= ~p_num_write~0 0) (= ~c_num_read~0 0) .cse0 .cse2 (= ~p_dw_st~0 0) .cse3))) [2021-10-20 06:06:23,208 INFO L857 garLoopResultBuilder]: For program point L244(lines 244 248) no Hoare annotation was computed. [2021-10-20 06:06:23,208 INFO L857 garLoopResultBuilder]: For program point L244-1(lines 239 279) no Hoare annotation was computed. [2021-10-20 06:06:23,208 INFO L860 garLoopResultBuilder]: At program point L328(lines 305 333) the Hoare annotation is: true [2021-10-20 06:06:23,209 INFO L853 garLoopResultBuilder]: At program point L64(lines 52 66) the Hoare annotation is: (let ((.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse1 (= ~q_free~0 0))) (or (and (= ~p_dw_pc~0 0) (= ~c_num_read~0 0) .cse0 .cse1 (<= ~p_num_write~0 1) (<= 1 ~p_num_write~0)) (and .cse0 (< ~c_num_read~0 ~p_num_write~0) .cse1 (= ~p_dw_pc~0 1) (<= ~p_num_write~0 (+ ~c_num_read~0 1))))) [2021-10-20 06:06:23,209 INFO L853 garLoopResultBuilder]: At program point L64-1(lines 52 66) the Hoare annotation is: (and (= ~p_last_write~0 ~q_buf_0~0) (= ~q_free~0 1) (<= ~p_num_write~0 ~c_num_read~0) (= ~p_dw_pc~0 1) (= ~c_last_read~0 ~p_last_write~0) (< ~c_num_read~0 (+ ~p_num_write~0 1))) [2021-10-20 06:06:23,209 INFO L857 garLoopResultBuilder]: For program point L98(lines 98 106) no Hoare annotation was computed. [2021-10-20 06:06:23,209 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2021-10-20 06:06:23,210 INFO L853 garLoopResultBuilder]: At program point L280(lines 232 285) the Hoare annotation is: (let ((.cse1 (= ~p_dw_pc~0 1)) (.cse2 (= ~c_dr_st~0 2)) (.cse4 (= ~p_dw_pc~0 0)) (.cse5 (= ~p_num_write~0 0)) (.cse6 (= ~c_num_read~0 0)) (.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse3 (= ~q_free~0 1)) (.cse7 (= ~p_dw_st~0 0)) (.cse8 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) .cse1 (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse2 .cse0 .cse3 (<= ~p_num_write~0 ~c_num_read~0) .cse1 (< ~c_num_read~0 (+ ~p_num_write~0 1))) (and .cse4 .cse5 .cse6 .cse2 .cse0 .cse3 .cse7 .cse8) (and .cse4 .cse5 .cse6 .cse0 .cse3 .cse7 (= ~c_dr_pc~0 0) .cse8))) [2021-10-20 06:06:23,210 INFO L853 garLoopResultBuilder]: At program point L264(lines 239 279) the Hoare annotation is: (let ((.cse1 (= ~p_dw_pc~0 1)) (.cse2 (= ~c_dr_st~0 2)) (.cse4 (= ~p_dw_pc~0 0)) (.cse5 (= ~p_num_write~0 0)) (.cse6 (= ~c_num_read~0 0)) (.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse3 (= ~q_free~0 1)) (.cse7 (= ~p_dw_st~0 0)) (.cse8 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) .cse1 (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse2 .cse0 .cse3 (<= ~p_num_write~0 ~c_num_read~0) .cse1 (< ~c_num_read~0 (+ ~p_num_write~0 1))) (and .cse4 .cse5 .cse6 .cse2 .cse0 .cse3 .cse7 .cse8) (and .cse4 .cse5 .cse6 .cse0 .cse3 .cse7 (= ~c_dr_pc~0 0) .cse8))) [2021-10-20 06:06:23,210 INFO L857 garLoopResultBuilder]: For program point L34(lines 34 43) no Hoare annotation was computed. [2021-10-20 06:06:23,210 INFO L857 garLoopResultBuilder]: For program point L34-2(lines 34 43) no Hoare annotation was computed. [2021-10-20 06:06:23,211 INFO L857 garLoopResultBuilder]: For program point L34-3(lines 34 43) no Hoare annotation was computed. [2021-10-20 06:06:23,211 INFO L857 garLoopResultBuilder]: For program point L34-5(lines 34 43) no Hoare annotation was computed. [2021-10-20 06:06:23,211 INFO L853 garLoopResultBuilder]: At program point L315-1(lines 194 327) the Hoare annotation is: (let ((.cse1 (= ~p_dw_pc~0 1)) (.cse2 (= ~c_dr_st~0 2)) (.cse4 (= ~p_dw_pc~0 0)) (.cse5 (= ~p_num_write~0 0)) (.cse6 (= ~c_num_read~0 0)) (.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse3 (= ~q_free~0 1)) (.cse7 (= ~p_dw_st~0 0)) (.cse8 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) .cse1 (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse2 .cse0 .cse3 (<= ~p_num_write~0 ~c_num_read~0) .cse1 (< ~c_num_read~0 (+ ~p_num_write~0 1))) (and .cse4 .cse5 .cse6 .cse2 .cse0 .cse3 .cse7 .cse8) (and .cse4 .cse5 .cse6 .cse0 .cse3 .cse7 (= ~c_dr_pc~0 0) .cse8))) [2021-10-20 06:06:23,211 INFO L853 garLoopResultBuilder]: At program point L249(lines 239 279) the Hoare annotation is: (let ((.cse1 (= ~p_dw_pc~0 1)) (.cse2 (= ~c_dr_st~0 2)) (.cse4 (= ~p_dw_pc~0 0)) (.cse5 (= ~p_num_write~0 0)) (.cse6 (= ~c_num_read~0 0)) (.cse0 (= ~p_last_write~0 ~q_buf_0~0)) (.cse3 (= ~q_free~0 1)) (.cse7 (= ~p_dw_st~0 0)) (.cse8 (= ~c_last_read~0 ~p_last_write~0))) (or (and .cse0 (< ~c_num_read~0 ~p_num_write~0) (= ~q_free~0 0) .cse1 (= 2 ~p_dw_st~0) (<= ~p_num_write~0 (+ ~c_num_read~0 1))) (and .cse2 .cse0 .cse3 (<= ~p_num_write~0 ~c_num_read~0) .cse1 (< ~c_num_read~0 (+ ~p_num_write~0 1))) (and .cse4 .cse5 .cse6 .cse2 .cse0 .cse3 .cse7 .cse8) (and .cse4 .cse5 .cse6 .cse0 .cse3 .cse7 (= ~c_dr_pc~0 0) .cse8))) [2021-10-20 06:06:23,212 INFO L857 garLoopResultBuilder]: For program point L101(lines 101 105) no Hoare annotation was computed. [2021-10-20 06:06:23,212 INFO L857 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2021-10-20 06:06:23,212 INFO L857 garLoopResultBuilder]: For program point L35-1(lines 35 40) no Hoare annotation was computed. [2021-10-20 06:06:23,222 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 06:06:23,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:06:23 BoogieIcfgContainer [2021-10-20 06:06:23,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 06:06:23,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 06:06:23,271 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 06:06:23,272 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 06:06:23,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:06:08" (3/4) ... [2021-10-20 06:06:23,282 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-20 06:06:23,305 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 33 nodes and edges [2021-10-20 06:06:23,306 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-20 06:06:23,307 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-20 06:06:23,308 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-20 06:06:23,427 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 06:06:23,427 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 06:06:23,428 INFO L168 Benchmark]: Toolchain (without parser) took 16475.62 ms. Allocated memory was 90.2 MB in the beginning and 207.6 MB in the end (delta: 117.4 MB). Free memory was 58.7 MB in the beginning and 144.0 MB in the end (delta: -85.3 MB). Peak memory consumption was 32.8 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,429 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 90.2 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 06:06:23,429 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.70 ms. Allocated memory is still 90.2 MB. Free memory was 58.4 MB in the beginning and 64.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,430 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 62.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,430 INFO L168 Benchmark]: Boogie Preprocessor took 61.13 ms. Allocated memory is still 90.2 MB. Free memory was 62.5 MB in the beginning and 61.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,431 INFO L168 Benchmark]: RCFGBuilder took 1007.76 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 61.0 MB in the beginning and 81.7 MB in the end (delta: -20.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,431 INFO L168 Benchmark]: TraceAbstraction took 14786.81 ms. Allocated memory was 111.1 MB in the beginning and 207.6 MB in the end (delta: 96.5 MB). Free memory was 81.3 MB in the beginning and 150.2 MB in the end (delta: -69.0 MB). Peak memory consumption was 97.7 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,432 INFO L168 Benchmark]: Witness Printer took 155.60 ms. Allocated memory is still 207.6 MB. Free memory was 149.2 MB in the beginning and 144.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-20 06:06:23,437 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 90.2 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.70 ms. Allocated memory is still 90.2 MB. Free memory was 58.4 MB in the beginning and 64.8 MB in the end (delta: -6.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.73 ms. Allocated memory is still 90.2 MB. Free memory was 64.8 MB in the beginning and 62.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.13 ms. Allocated memory is still 90.2 MB. Free memory was 62.5 MB in the beginning and 61.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1007.76 ms. Allocated memory was 90.2 MB in the beginning and 111.1 MB in the end (delta: 21.0 MB). Free memory was 61.0 MB in the beginning and 81.7 MB in the end (delta: -20.7 MB). Peak memory consumption was 26.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 14786.81 ms. Allocated memory was 111.1 MB in the beginning and 207.6 MB in the end (delta: 96.5 MB). Free memory was 81.3 MB in the beginning and 150.2 MB in the end (delta: -69.0 MB). Peak memory consumption was 97.7 MB. Max. memory is 16.1 GB. * Witness Printer took 155.60 ms. Allocated memory is still 207.6 MB. Free memory was 149.2 MB in the beginning and 144.0 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 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: 11]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 11]: 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, 44 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 14636.1ms, OverallIterations: 10, TraceHistogramMax: 3, EmptinessCheckTime: 45.7ms, AutomataDifference: 632.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 1025.7ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 686 SDtfs, 467 SDslu, 666 SDs, 0 SdLazy, 106 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 201.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 127 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 7480.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=303occurred in iteration=8, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 309.1ms AutomataMinimizationTime, 10 MinimizatonAttempts, 189 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 14 PreInvPairs, 59 NumberOfFragments, 692 HoareAnnotationTreeSize, 14 FomulaSimplifications, 901 FormulaSimplificationTreeSizeReduction, 117.9ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 281 FormulaSimplificationTreeSizeReductionInter, 894.4ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 99.4ms SsaConstructionTime, 394.0ms SatisfiabilityAnalysisTime, 1563.7ms InterpolantComputationTime, 337 NumberOfCodeBlocks, 337 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 358 ConstructedInterpolants, 0 QuantifiedInterpolants, 1248 SizeOfPredicates, 2 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 12 InterpolantComputations, 9 PerfectInterpolantSequences, 42/48 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 2 specifications checked. All of them hold - InvariantResult [Line: 194]: Loop Invariant Derived loop invariant: (((((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1) || (((((c_dr_st == 2 && p_last_write == q_buf_0) && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_num_read < p_num_write + 1)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && c_dr_st == 2) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_last_read == p_last_write)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_dr_pc == 0) && c_last_read == p_last_write) - InvariantResult [Line: 140]: Loop Invariant Derived loop invariant: ((((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1) || (((((p_last_write == q_buf_0 && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_last_read == p_last_write) && c_num_read < p_num_write + 1)) || ((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_last_read == p_last_write) - InvariantResult [Line: -1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 97]: Loop Invariant Derived loop invariant: ((((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && c_dr_st == 2) && p_last_write == q_buf_0) && q_free == 1) && c_last_read == p_last_write) || (((((p_dw_pc == 0 && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 0) && p_num_write <= 1) && 1 <= p_num_write)) || ((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && p_num_write <= c_num_read + 1)) || ((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && c_dr_pc == 0) && c_last_read == p_last_write) - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: (((((p_dw_pc == 0 && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 0) && p_num_write <= 1) && 1 <= p_num_write) || ((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && p_num_write <= c_num_read + 1) - InvariantResult [Line: 97]: Loop Invariant Derived loop invariant: (((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) || (((p_last_write == q_buf_0 && p_num_write <= c_num_read) && p_dw_pc == 1) && c_num_read < p_num_write + 1) - InvariantResult [Line: 239]: Loop Invariant Derived loop invariant: (((((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1) || (((((c_dr_st == 2 && p_last_write == q_buf_0) && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_num_read < p_num_write + 1)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && c_dr_st == 2) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_last_read == p_last_write)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_dr_pc == 0) && c_last_read == p_last_write) - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: ((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1 - InvariantResult [Line: 52]: Loop Invariant Derived loop invariant: ((((p_last_write == q_buf_0 && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_last_read == p_last_write) && c_num_read < p_num_write + 1 - InvariantResult [Line: 232]: Loop Invariant Derived loop invariant: (((((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1) || (((((c_dr_st == 2 && p_last_write == q_buf_0) && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_num_read < p_num_write + 1)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && c_dr_st == 2) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_last_read == p_last_write)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_dr_pc == 0) && c_last_read == p_last_write) - InvariantResult [Line: 239]: Loop Invariant Derived loop invariant: (((((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && 2 == p_dw_st) && p_num_write <= c_num_read + 1) || (((((c_dr_st == 2 && p_last_write == q_buf_0) && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && c_num_read < p_num_write + 1)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && c_dr_st == 2) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_last_read == p_last_write)) || (((((((p_dw_pc == 0 && p_num_write == 0) && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 1) && p_dw_st == 0) && c_dr_pc == 0) && c_last_read == p_last_write) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((p_dw_pc == 0 && c_num_read == 0) && p_last_write == q_buf_0) && q_free == 0) && p_num_write <= 1) && 1 <= p_num_write) || ((((p_last_write == q_buf_0 && c_num_read < p_num_write) && q_free == 0) && p_dw_pc == 1) && p_num_write <= c_num_read + 1) - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: (((((p_last_write == q_buf_0 && q_free == 1) && p_num_write <= c_num_read) && p_dw_pc == 1) && 2 == p_dw_st) && c_last_read == p_last_write) && c_num_read < p_num_write + 1 - InvariantResult [Line: 305]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-20 06:06:23,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d40707ce-7160-451b-a175-4c4fdc0abb2b/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...