./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI --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 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:58:03,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:58:03,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:58:04,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:58:04,022 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:58:04,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:58:04,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:58:04,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:58:04,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:58:04,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:58:04,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:58:04,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:58:04,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:58:04,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:58:04,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:58:04,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:58:04,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:58:04,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:58:04,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:58:04,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:58:04,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:58:04,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:58:04,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:58:04,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:58:04,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:58:04,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:58:04,060 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:58:04,061 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:58:04,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:58:04,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:58:04,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:58:04,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:58:04,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:58:04,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:58:04,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:58:04,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:58:04,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:58:04,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:58:04,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:58:04,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:58:04,077 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:58:04,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:58:04,106 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:58:04,106 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:58:04,106 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:58:04,107 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:58:04,107 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:58:04,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:58:04,108 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:58:04,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:58:04,108 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:58:04,108 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:58:04,109 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:58:04,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:58:04,109 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:58:04,109 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:58:04,110 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:58:04,110 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:58:04,110 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:58:04,110 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:58:04,111 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:58:04,111 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:58:04,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:58:04,112 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:58:04,112 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:58:04,112 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:58:04,112 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:58:04,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:58:04,113 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:58:04,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:58:04,113 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:58:04,113 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:58:04,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:58:04,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:58:04,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:04,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:58:04,115 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:58:04,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:58:04,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:58:04,115 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:58:04,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:58:04,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:58:04,116 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:58:04,116 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3da1085986a33686aa7ffc74caa759bc9bd987d241f97554ff5ad69a436a7e40 [2022-11-03 01:58:04,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:58:04,429 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:58:04,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:58:04,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:58:04,436 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:58:04,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 01:58:04,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/data/e5c80085e/af2b331ad82044b1aff257cbcbbb1c0b/FLAG0be1a4b9c [2022-11-03 01:58:05,091 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:58:05,092 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 01:58:05,113 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/data/e5c80085e/af2b331ad82044b1aff257cbcbbb1c0b/FLAG0be1a4b9c [2022-11-03 01:58:05,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/data/e5c80085e/af2b331ad82044b1aff257cbcbbb1c0b [2022-11-03 01:58:05,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:58:05,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:58:05,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:05,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:58:05,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:58:05,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@594dbcf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05, skipping insertion in model container [2022-11-03 01:58:05,450 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:58:05,515 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:58:05,770 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-03 01:58:05,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:05,821 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:58:05,869 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[4373,4386] [2022-11-03 01:58:05,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:58:05,920 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:58:05,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05 WrapperNode [2022-11-03 01:58:05,921 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:58:05,922 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:05,922 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:58:05,922 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:58:05,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,941 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,967 INFO L138 Inliner]: procedures = 22, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 333 [2022-11-03 01:58:05,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:58:05,968 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:58:05,968 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:58:05,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:58:05,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,990 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,992 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,993 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:05,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:58:05,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:58:05,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:58:05,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:58:05,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (1/1) ... [2022-11-03 01:58:06,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:58:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:06,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:58:06,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:58:06,085 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:58:06,085 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:58:06,085 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:58:06,085 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:58:06,273 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:58:06,280 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:58:06,663 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:58:06,800 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:58:06,801 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-03 01:58:06,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:06 BoogieIcfgContainer [2022-11-03 01:58:06,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:58:06,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:58:06,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:58:06,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:58:06,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:58:05" (1/3) ... [2022-11-03 01:58:06,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503d6384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:06, skipping insertion in model container [2022-11-03 01:58:06,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:58:05" (2/3) ... [2022-11-03 01:58:06,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@503d6384 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:58:06, skipping insertion in model container [2022-11-03 01:58:06,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:58:06" (3/3) ... [2022-11-03 01:58:06,812 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2022-11-03 01:58:06,831 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:58:06,831 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:58:06,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:58:06,888 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@221cc917, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:58:06,888 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:58:06,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 01:58:06,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:06,901 INFO L195 NwaCegarLoop]: 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] [2022-11-03 01:58:06,901 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:06,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2009903804, now seen corresponding path program 1 times [2022-11-03 01:58:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:06,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278363426] [2022-11-03 01:58:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:06,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:07,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278363426] [2022-11-03 01:58:07,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278363426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:07,308 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:07,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:07,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131879096] [2022-11-03 01:58:07,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:07,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:07,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:07,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:07,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:07,359 INFO L87 Difference]: Start difference. First operand has 64 states, 62 states have (on average 1.6774193548387097) internal successors, (104), 63 states have internal predecessors, (104), 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 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) [2022-11-03 01:58:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:07,485 INFO L93 Difference]: Finished difference Result 143 states and 221 transitions. [2022-11-03 01:58:07,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:07,491 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 [2022-11-03 01:58:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:07,501 INFO L225 Difference]: With dead ends: 143 [2022-11-03 01:58:07,501 INFO L226 Difference]: Without dead ends: 94 [2022-11-03 01:58:07,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:07,514 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 75 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:07,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 190 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:07,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-03 01:58:07,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2022-11-03 01:58:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.4065934065934067) internal successors, (128), 91 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:07,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 128 transitions. [2022-11-03 01:58:07,575 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 128 transitions. Word has length 28 [2022-11-03 01:58:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:07,575 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 128 transitions. [2022-11-03 01:58:07,576 INFO L496 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) [2022-11-03 01:58:07,577 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 128 transitions. [2022-11-03 01:58:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 01:58:07,580 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:07,581 INFO L195 NwaCegarLoop]: 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] [2022-11-03 01:58:07,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:58:07,581 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2120990104, now seen corresponding path program 1 times [2022-11-03 01:58:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:07,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685623335] [2022-11-03 01:58:07,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:07,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:07,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685623335] [2022-11-03 01:58:07,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685623335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:07,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:07,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934764635] [2022-11-03 01:58:07,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:07,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:07,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:07,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:07,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:07,769 INFO L87 Difference]: Start difference. First operand 92 states and 128 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) [2022-11-03 01:58:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:07,872 INFO L93 Difference]: Finished difference Result 216 states and 312 transitions. [2022-11-03 01:58:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:07,872 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 31 [2022-11-03 01:58:07,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:07,878 INFO L225 Difference]: With dead ends: 216 [2022-11-03 01:58:07,878 INFO L226 Difference]: Without dead ends: 143 [2022-11-03 01:58:07,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:07,885 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 56 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:07,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 150 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-03 01:58:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2022-11-03 01:58:07,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.4285714285714286) internal successors, (200), 140 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:07,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 200 transitions. [2022-11-03 01:58:07,937 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 200 transitions. Word has length 31 [2022-11-03 01:58:07,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:07,939 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 200 transitions. [2022-11-03 01:58:07,939 INFO L496 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) [2022-11-03 01:58:07,940 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 200 transitions. [2022-11-03 01:58:07,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 01:58:07,941 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:07,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:07,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:58:07,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash -153538504, now seen corresponding path program 1 times [2022-11-03 01:58:07,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:07,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663970708] [2022-11-03 01:58:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:07,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:08,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663970708] [2022-11-03 01:58:08,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663970708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:08,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:08,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 01:58:08,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391699087] [2022-11-03 01:58:08,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:58:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:58:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:08,012 INFO L87 Difference]: Start difference. First operand 141 states and 200 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:08,076 INFO L93 Difference]: Finished difference Result 341 states and 494 transitions. [2022-11-03 01:58:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:58:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 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 34 [2022-11-03 01:58:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:08,079 INFO L225 Difference]: With dead ends: 341 [2022-11-03 01:58:08,079 INFO L226 Difference]: Without dead ends: 219 [2022-11-03 01:58:08,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:58:08,081 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 51 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:08,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 135 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:58:08,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-11-03 01:58:08,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2022-11-03 01:58:08,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.4259259259259258) internal successors, (308), 216 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 308 transitions. [2022-11-03 01:58:08,134 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 308 transitions. Word has length 34 [2022-11-03 01:58:08,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:08,135 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 308 transitions. [2022-11-03 01:58:08,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,135 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 308 transitions. [2022-11-03 01:58:08,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:58:08,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:08,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:08,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:58:08,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:08,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash 822843485, now seen corresponding path program 1 times [2022-11-03 01:58:08,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:08,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760727425] [2022-11-03 01:58:08,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:08,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760727425] [2022-11-03 01:58:08,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760727425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:08,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:08,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 01:58:08,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592901131] [2022-11-03 01:58:08,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:08,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:08,292 INFO L87 Difference]: Start difference. First operand 217 states and 308 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:08,505 INFO L93 Difference]: Finished difference Result 703 states and 1007 transitions. [2022-11-03 01:58:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:08,506 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 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 37 [2022-11-03 01:58:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:08,509 INFO L225 Difference]: With dead ends: 703 [2022-11-03 01:58:08,509 INFO L226 Difference]: Without dead ends: 505 [2022-11-03 01:58:08,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:08,523 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 142 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:08,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 242 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-03 01:58:08,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 501. [2022-11-03 01:58:08,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 1.424) internal successors, (712), 500 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 712 transitions. [2022-11-03 01:58:08,698 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 712 transitions. Word has length 37 [2022-11-03 01:58:08,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:08,699 INFO L495 AbstractCegarLoop]: Abstraction has 501 states and 712 transitions. [2022-11-03 01:58:08,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:08,699 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 712 transitions. [2022-11-03 01:58:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:58:08,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:08,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:08,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:58:08,705 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:08,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1572416538, now seen corresponding path program 1 times [2022-11-03 01:58:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:08,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303936359] [2022-11-03 01:58:08,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:08,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:08,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:08,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303936359] [2022-11-03 01:58:08,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303936359] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:08,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:08,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 01:58:08,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193016943] [2022-11-03 01:58:08,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:08,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 01:58:08,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:08,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 01:58:08,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 01:58:08,856 INFO L87 Difference]: Start difference. First operand 501 states and 712 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:09,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:09,258 INFO L93 Difference]: Finished difference Result 1291 states and 1856 transitions. [2022-11-03 01:58:09,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 01:58:09,259 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 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 39 [2022-11-03 01:58:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:09,266 INFO L225 Difference]: With dead ends: 1291 [2022-11-03 01:58:09,266 INFO L226 Difference]: Without dead ends: 809 [2022-11-03 01:58:09,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:58:09,269 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 323 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:09,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [323 Valid, 90 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:09,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-11-03 01:58:09,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 807. [2022-11-03 01:58:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.4218362282878412) internal successors, (1146), 806 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1146 transitions. [2022-11-03 01:58:09,509 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1146 transitions. Word has length 39 [2022-11-03 01:58:09,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:09,510 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 1146 transitions. [2022-11-03 01:58:09,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:09,510 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1146 transitions. [2022-11-03 01:58:09,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 01:58:09,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:09,521 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:09,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:58:09,522 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:09,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1759782901, now seen corresponding path program 1 times [2022-11-03 01:58:09,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:09,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208016354] [2022-11-03 01:58:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:09,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:09,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:09,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208016354] [2022-11-03 01:58:09,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208016354] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:58:09,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:58:09,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-03 01:58:09,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671363750] [2022-11-03 01:58:09,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:58:09,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-03 01:58:09,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:58:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-03 01:58:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-03 01:58:09,964 INFO L87 Difference]: Start difference. First operand 807 states and 1146 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:58:10,524 INFO L93 Difference]: Finished difference Result 1726 states and 2476 transitions. [2022-11-03 01:58:10,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-03 01:58:10,525 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 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 39 [2022-11-03 01:58:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:58:10,533 INFO L225 Difference]: With dead ends: 1726 [2022-11-03 01:58:10,534 INFO L226 Difference]: Without dead ends: 1724 [2022-11-03 01:58:10,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-11-03 01:58:10,536 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 376 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:58:10,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 816 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:58:10,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1724 states. [2022-11-03 01:58:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1724 to 928. [2022-11-03 01:58:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 1.4207119741100325) internal successors, (1317), 927 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1317 transitions. [2022-11-03 01:58:10,786 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1317 transitions. Word has length 39 [2022-11-03 01:58:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:58:10,786 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1317 transitions. [2022-11-03 01:58:10,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:58:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1317 transitions. [2022-11-03 01:58:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 01:58:10,787 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:58:10,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:58:10,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:58:10,788 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:58:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:58:10,789 INFO L85 PathProgramCache]: Analyzing trace with hash -418290670, now seen corresponding path program 1 times [2022-11-03 01:58:10,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:58:10,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252513430] [2022-11-03 01:58:10,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:10,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:58:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:11,952 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:58:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252513430] [2022-11-03 01:58:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252513430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:58:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301636845] [2022-11-03 01:58:11,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:58:11,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:58:11,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:58:11,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:58:11,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:58:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:58:12,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-03 01:58:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:58:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:13,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:58:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:58:17,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301636845] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:58:17,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217463710] [2022-11-03 01:58:17,729 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 01:58:17,731 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:58:17,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:58:17,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:58:17,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:58:18,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:18,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:58:18,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-03 01:58:18,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:58:18,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-11-03 02:00:37,640 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:00:53,789 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11667#(and (<= |ULTIMATE.start_main_~check__tmp~0#1| 1) (<= 0 ~id3~0) (<= 0 (+ ~p3_new~0 1)) (<= |ULTIMATE.start_main_~assert__arg~0#1| 1) (<= 0 |ULTIMATE.start_main_~check__tmp~0#1|) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (= ~p2~0 0) (<= (+ ~p1_new~0 1) 0) (<= |ULTIMATE.start_main_~main__c1~0#1| 1) (= ~__return_6514~0 0) (<= 0 ~mode3~0) (<= ~send1~0 127) (<= ~st1~0 0) (<= 0 (+ ~p3_old~0 1)) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (<= 0 ~st2~0) (<= ~__return_6448~0 1) (<= ~mode3~0 1) (<= 0 ~send2~0) (<= 0 (+ |ULTIMATE.start_main_~node1__m1~0#1| 1)) (<= ~id1~0 127) (<= (+ ~p3_old~0 1) 0) (<= |ULTIMATE.start_main_~__tmp_1~0#1| 1) (<= ~send2~0 127) (= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 |ULTIMATE.start_main_~__tmp_1~0#1|) (<= 0 (+ ~p2_new~0 1)) (<= (+ |ULTIMATE.start_main_~node1__m1~0#1| 1) 0) (<= 0 ~__return_6448~0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (<= ~st2~0 0) (<= (+ ~p2_new~0 1) 0) (<= ~__return_6343~0 1) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 1 ~__return_6343~0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= (+ ~p3_new~0 1) 0) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= 0 (+ ~p1_new~0 1)) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (= ~p1~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~send1~0) (<= 0 |ULTIMATE.start_main_~main__c1~0#1|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (= ~__return_main~0 0) (<= 0 |ULTIMATE.start_main_~assert__arg~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:00:53,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:00:53,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:00:53,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 38 [2022-11-03 02:00:53,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91232774] [2022-11-03 02:00:53,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:00:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-03 02:00:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:00:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-03 02:00:53,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=4820, Unknown=0, NotChecked=0, Total=5550 [2022-11-03 02:00:53,794 INFO L87 Difference]: Start difference. First operand 928 states and 1317 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:18,584 INFO L93 Difference]: Finished difference Result 13488 states and 19094 transitions. [2022-11-03 02:01:18,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-11-03 02:01:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 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 47 [2022-11-03 02:01:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:18,631 INFO L225 Difference]: With dead ends: 13488 [2022-11-03 02:01:18,631 INFO L226 Difference]: Without dead ends: 11829 [2022-11-03 02:01:18,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15691 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=5478, Invalid=32742, Unknown=0, NotChecked=0, Total=38220 [2022-11-03 02:01:18,649 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 5453 mSDsluCounter, 2831 mSDsCounter, 0 mSdLazyCounter, 3969 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5453 SdHoareTripleChecker+Valid, 2936 SdHoareTripleChecker+Invalid, 4410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 3969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:18,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5453 Valid, 2936 Invalid, 4410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 3969 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-03 02:01:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11829 states. [2022-11-03 02:01:20,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11829 to 6198. [2022-11-03 02:01:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6198 states, 6197 states have (on average 1.3897046958205583) internal successors, (8612), 6197 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6198 states to 6198 states and 8612 transitions. [2022-11-03 02:01:20,443 INFO L78 Accepts]: Start accepts. Automaton has 6198 states and 8612 transitions. Word has length 47 [2022-11-03 02:01:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:20,444 INFO L495 AbstractCegarLoop]: Abstraction has 6198 states and 8612 transitions. [2022-11-03 02:01:20,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 38 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:20,444 INFO L276 IsEmpty]: Start isEmpty. Operand 6198 states and 8612 transitions. [2022-11-03 02:01:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:01:20,445 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:20,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:20,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 02:01:20,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:20,674 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:20,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171685, now seen corresponding path program 1 times [2022-11-03 02:01:20,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:20,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447732333] [2022-11-03 02:01:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:20,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 02:01:20,798 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:20,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447732333] [2022-11-03 02:01:20,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447732333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:01:20,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:01:20,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:01:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491671739] [2022-11-03 02:01:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:01:20,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:01:20,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:01:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:01:20,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:01:20,801 INFO L87 Difference]: Start difference. First operand 6198 states and 8612 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:23,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:01:23,226 INFO L93 Difference]: Finished difference Result 15265 states and 21328 transitions. [2022-11-03 02:01:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:01:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 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 47 [2022-11-03 02:01:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:01:23,251 INFO L225 Difference]: With dead ends: 15265 [2022-11-03 02:01:23,251 INFO L226 Difference]: Without dead ends: 9151 [2022-11-03 02:01:23,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:01:23,259 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 300 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:01:23,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 100 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:01:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9151 states. [2022-11-03 02:01:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9151 to 9069. [2022-11-03 02:01:25,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 1.3888398764887517) internal successors, (12594), 9068 states have internal predecessors, (12594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 12594 transitions. [2022-11-03 02:01:25,894 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 12594 transitions. Word has length 47 [2022-11-03 02:01:25,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:01:25,894 INFO L495 AbstractCegarLoop]: Abstraction has 9069 states and 12594 transitions. [2022-11-03 02:01:25,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:01:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 12594 transitions. [2022-11-03 02:01:25,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-03 02:01:25,896 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:01:25,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:01:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:01:25,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:01:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:01:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -112007018, now seen corresponding path program 1 times [2022-11-03 02:01:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:01:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42934160] [2022-11-03 02:01:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:01:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:26,907 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:01:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42934160] [2022-11-03 02:01:26,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42934160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:01:26,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027429537] [2022-11-03 02:01:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:01:26,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:01:26,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:01:26,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:01:26,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:01:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:01:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-03 02:01:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:01:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:27,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:01:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:01:32,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027429537] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:01:32,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911756565] [2022-11-03 02:01:32,299 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-03 02:01:32,299 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:01:32,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:01:32,299 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:01:32,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:01:32,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:32,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:32,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:01:32,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-11-03 02:01:32,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:32,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:01:32,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-03 02:01:45,678 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:02:08,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83269#(and (<= ~send3~0 127) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= ~st3~0 0) (<= 0 (+ ~p1_old~0 1)) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~__return_6514~0 0) (<= 0 ~st2~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_6448~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6448~0) (<= 0 ~send2~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= ~send2~0 127) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~st2~0 0) (<= ~__return_6343~0 1) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 1 ~__return_6343~0) (<= ~p2~0 0) (<= 0 ~__return_6514~0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (<= 0 (+ |ULTIMATE.start_main_~node2__m2~0#1| 1)) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= (+ ~p1_old~0 1) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_main_~node2__m2~0#1| 1) 0) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:02:08,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:02:08,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:02:08,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-11-03 02:02:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426673023] [2022-11-03 02:02:08,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:02:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-03 02:02:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:02:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-03 02:02:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=4943, Unknown=0, NotChecked=0, Total=5700 [2022-11-03 02:02:08,271 INFO L87 Difference]: Start difference. First operand 9069 states and 12594 transitions. Second operand has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:02:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:02:56,230 INFO L93 Difference]: Finished difference Result 43691 states and 60192 transitions. [2022-11-03 02:02:56,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-03 02:02:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 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 47 [2022-11-03 02:02:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:02:56,330 INFO L225 Difference]: With dead ends: 43691 [2022-11-03 02:02:56,330 INFO L226 Difference]: Without dead ends: 37210 [2022-11-03 02:02:56,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31205 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=11637, Invalid=60455, Unknown=0, NotChecked=0, Total=72092 [2022-11-03 02:02:56,352 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 7101 mSDsluCounter, 3905 mSDsCounter, 0 mSdLazyCounter, 5039 mSolverCounterSat, 686 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7101 SdHoareTripleChecker+Valid, 4083 SdHoareTripleChecker+Invalid, 5725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 686 IncrementalHoareTripleChecker+Valid, 5039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:02:56,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7101 Valid, 4083 Invalid, 5725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [686 Valid, 5039 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-11-03 02:02:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37210 states. [2022-11-03 02:03:03,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37210 to 24857. [2022-11-03 02:03:03,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24857 states, 24856 states have (on average 1.3738332796910202) internal successors, (34148), 24856 states have internal predecessors, (34148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24857 states to 24857 states and 34148 transitions. [2022-11-03 02:03:04,031 INFO L78 Accepts]: Start accepts. Automaton has 24857 states and 34148 transitions. Word has length 47 [2022-11-03 02:03:04,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:03:04,031 INFO L495 AbstractCegarLoop]: Abstraction has 24857 states and 34148 transitions. [2022-11-03 02:03:04,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.425) internal successors, (137), 40 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:03:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 24857 states and 34148 transitions. [2022-11-03 02:03:04,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-03 02:03:04,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:03:04,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:03:04,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:03:04,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:03:04,249 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:03:04,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:03:04,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1788557960, now seen corresponding path program 1 times [2022-11-03 02:03:04,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:03:04,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970591085] [2022-11-03 02:03:04,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:04,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:03:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:05,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:03:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970591085] [2022-11-03 02:03:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970591085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:03:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299172762] [2022-11-03 02:03:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:03:05,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:03:05,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:03:05,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:03:05,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3e304001-15bf-42eb-8daa-4dafb09dcec6/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:03:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:03:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-03 02:03:05,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:03:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:06,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:03:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:03:10,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299172762] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:03:10,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625742733] [2022-11-03 02:03:10,557 INFO L159 IcfgInterpreter]: Started Sifa with 42 locations of interest [2022-11-03 02:03:10,558 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:03:10,558 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:03:10,558 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:03:10,558 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:03:10,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:03:10,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 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 [2022-11-03 02:03:10,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:10,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:03:10,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 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 [2022-11-03 02:03:23,019 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:03:50,128 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '193948#(and (<= ~send3~0 127) (<= 0 ~id3~0) (= ~nomsg~0 ~p1_new~0) (<= ~st3~0 0) (<= 0 ~mode1~0) (<= |ULTIMATE.start_main_~main__i2~0#1| 6) (<= 0 ~id1~0) (<= 0 (+ |ULTIMATE.start_main_~node3__m3~0#1| 1)) (<= 0 ~mode3~0) (= ~p3_new~0 ~nomsg~0) (<= 0 |ULTIMATE.start_main_~main__i2~0#1|) (<= ~mode2~0 1) (<= 0 ~st1~0) (or (not (<= (+ ~st3~0 ~st2~0 ~st1~0) 1)) (and (not (< ~r1~0 3)) (not (= (+ ~st3~0 ~st2~0 ~st1~0) 1)))) (<= ~__return_6514~0 0) (<= 0 ~st2~0) (= |ULTIMATE.start_main_~check__tmp~0#1| ~__return_6448~0) (<= ~p1~0 0) (<= ~__return_main~0 0) (<= ~mode3~0 1) (<= 0 ~p2~0) (= |ULTIMATE.start_main_~main__c1~0#1| ~__return_6448~0) (<= 0 (+ ~p2_old~0 1)) (<= ~id1~0 127) (= ~nomsg~0 ~p2_new~0) (<= (+ ~nomsg~0 1) 0) (<= ~mode1~0 1) (= |ULTIMATE.start_main_~assert__arg~0#1| |ULTIMATE.start_main_~__tmp_1~0#1|) (<= ~__return_6343~0 1) (<= 0 ~__return_main~0) (<= ~id3~0 127) (<= 0 ~id2~0) (= |#NULL.offset| 0) (<= 0 (+ ~nomsg~0 1)) (<= 1 ~__return_6343~0) (<= ~p2~0 0) (<= 0 ~__return_6514~0) (<= 0 ~mode2~0) (<= ~id2~0 127) (<= 0 ~st3~0) (<= |ULTIMATE.start_main_~init__tmp~0#1| 1) (= ~p3~0 0) (<= (+ ~p2_old~0 1) 0) (= (ite (= |ULTIMATE.start_main_~main__c1~0#1| 0) 0 1) |ULTIMATE.start_main_~__tmp_1~0#1|) (= (mod |ULTIMATE.start_main_~assert__arg~0#1| 256) 0) (<= 0 ~send3~0) (<= 0 ~p1~0) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_main_~node3__m3~0#1| 1) 0) (<= 1 |ULTIMATE.start_main_~init__tmp~0#1|) (= |#NULL.base| 0))' at error location [2022-11-03 02:03:50,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:03:50,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:03:50,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-11-03 02:03:50,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652134785] [2022-11-03 02:03:50,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:03:50,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-03 02:03:50,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:03:50,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-03 02:03:50,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=5654, Unknown=0, NotChecked=0, Total=6480 [2022-11-03 02:03:50,131 INFO L87 Difference]: Start difference. First operand 24857 states and 34148 transitions. Second operand has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:04:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:04:59,917 INFO L93 Difference]: Finished difference Result 114447 states and 156762 transitions. [2022-11-03 02:04:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-11-03 02:04:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.3255813953488373) internal successors, (143), 43 states have internal predecessors, (143), 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 [2022-11-03 02:04:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:05:00,228 INFO L225 Difference]: With dead ends: 114447 [2022-11-03 02:05:00,228 INFO L226 Difference]: Without dead ends: 89791 [2022-11-03 02:05:00,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26780 ImplicationChecksByTransitivity, 60.1s TimeCoverageRelationStatistics Valid=9982, Invalid=53774, Unknown=0, NotChecked=0, Total=63756 [2022-11-03 02:05:00,288 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 7285 mSDsluCounter, 3182 mSDsCounter, 0 mSdLazyCounter, 3761 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7285 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 4308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 3761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-03 02:05:00,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7285 Valid, 3409 Invalid, 4308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 3761 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-03 02:05:00,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89791 states.