./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f 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_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0 --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 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 --- 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-e04fb08 [2022-11-16 20:10:00,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:10:00,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:10:00,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:10:00,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:10:00,978 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:10:00,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:10:00,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:10:00,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:10:00,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:10:00,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:10:00,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:10:00,990 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:10:00,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:10:00,994 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:10:01,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:10:01,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:10:01,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:10:01,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:10:01,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:10:01,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:10:01,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:10:01,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:10:01,025 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:10:01,028 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:10:01,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:10:01,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:10:01,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:10:01,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:10:01,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:10:01,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:10:01,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:10:01,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:10:01,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:10:01,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:10:01,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:10:01,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:10:01,050 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:10:01,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:10:01,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:10:01,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:10:01,054 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:10:01,094 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:10:01,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:10:01,095 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:10:01,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:10:01,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:10:01,097 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:10:01,097 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:10:01,097 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:10:01,098 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:10:01,098 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:10:01,099 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:10:01,099 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:10:01,100 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:10:01,100 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:10:01,100 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:10:01,100 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:10:01,100 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:10:01,101 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:10:01,101 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:10:01,102 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:10:01,102 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:10:01,102 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:10:01,102 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:10:01,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:10:01,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:10:01,105 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:10:01,105 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:10:01,105 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:10:01,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:10:01,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:10:01,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:10:01,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:10:01,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:01,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:10:01,107 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:10:01,108 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:10:01,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:10:01,108 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:10:01,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:10:01,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:10:01,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:10:01,109 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_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 79f20a4b12634e812af836a5fe92e9d987e7766e2c28337c49504608346f2347 [2022-11-16 20:10:01,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:10:01,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:10:01,459 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:10:01,460 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:10:01,461 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:10:01,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2022-11-16 20:10:01,534 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/data/cbd4c375f/4dd34fb54ecd4c078cf23420eb61e7ad/FLAG326704ea2 [2022-11-16 20:10:02,077 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:10:02,078 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/sv-benchmarks/c/systemc/token_ring.11.cil-1.c [2022-11-16 20:10:02,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/data/cbd4c375f/4dd34fb54ecd4c078cf23420eb61e7ad/FLAG326704ea2 [2022-11-16 20:10:02,396 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/data/cbd4c375f/4dd34fb54ecd4c078cf23420eb61e7ad [2022-11-16 20:10:02,399 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:10:02,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:10:02,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:02,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:10:02,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:10:02,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:02,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b17a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02, skipping insertion in model container [2022-11-16 20:10:02,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:02,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:10:02,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:10:02,660 WARN L229 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_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2022-11-16 20:10:02,814 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:02,844 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:10:02,855 WARN L229 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_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/sv-benchmarks/c/systemc/token_ring.11.cil-1.c[671,684] [2022-11-16 20:10:02,958 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:10:02,987 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:10:02,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02 WrapperNode [2022-11-16 20:10:02,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:10:02,989 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:02,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:10:02,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:10:02,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,024 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,098 INFO L138 Inliner]: procedures = 50, calls = 65, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 800 [2022-11-16 20:10:03,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:10:03,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:10:03,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:10:03,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:10:03,120 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,124 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,179 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:10:03,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:10:03,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:10:03,206 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:10:03,219 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (1/1) ... [2022-11-16 20:10:03,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:10:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:03,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:10:03,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:10:03,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:10:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-16 20:10:03,314 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-16 20:10:03,314 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 20:10:03,314 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 20:10:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-16 20:10:03,315 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-16 20:10:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-16 20:10:03,315 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-16 20:10:03,315 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-16 20:10:03,316 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-16 20:10:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-16 20:10:03,316 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-16 20:10:03,316 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-16 20:10:03,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-16 20:10:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:10:03,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:10:03,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:10:03,444 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:10:03,446 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:10:04,480 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:10:04,967 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:10:04,967 INFO L300 CfgBuilder]: Removed 14 assume(true) statements. [2022-11-16 20:10:04,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:04 BoogieIcfgContainer [2022-11-16 20:10:04,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:10:04,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:10:04,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:10:04,982 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:10:04,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:10:02" (1/3) ... [2022-11-16 20:10:04,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc94d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:04, skipping insertion in model container [2022-11-16 20:10:04,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:10:02" (2/3) ... [2022-11-16 20:10:04,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dc94d4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:10:04, skipping insertion in model container [2022-11-16 20:10:04,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:10:04" (3/3) ... [2022-11-16 20:10:04,989 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.11.cil-1.c [2022-11-16 20:10:05,010 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:10:05,010 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:10:05,086 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:10:05,099 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;@55bab99d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:10:05,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:10:05,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 183 states, 147 states have (on average 1.564625850340136) internal successors, (230), 151 states have internal predecessors, (230), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-16 20:10:05,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 20:10:05,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:05,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:05,128 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:05,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:05,136 INFO L85 PathProgramCache]: Analyzing trace with hash 986730501, now seen corresponding path program 1 times [2022-11-16 20:10:05,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:05,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429531435] [2022-11-16 20:10:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:05,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:10:05,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:05,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429531435] [2022-11-16 20:10:05,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429531435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:05,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:05,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 20:10:05,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081204552] [2022-11-16 20:10:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:05,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:10:05,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:05,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:10:05,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:05,793 INFO L87 Difference]: Start difference. First operand has 183 states, 147 states have (on average 1.564625850340136) internal successors, (230), 151 states have internal predecessors, (230), 27 states have call successors, (27), 7 states have call predecessors, (27), 7 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:10:06,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:06,472 INFO L93 Difference]: Finished difference Result 526 states and 833 transitions. [2022-11-16 20:10:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:10:06,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-11-16 20:10:06,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:06,490 INFO L225 Difference]: With dead ends: 526 [2022-11-16 20:10:06,502 INFO L226 Difference]: Without dead ends: 344 [2022-11-16 20:10:06,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:06,512 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 487 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:06,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 766 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:10:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-16 20:10:06,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-11-16 20:10:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 282 states have (on average 1.524822695035461) internal successors, (430), 285 states have internal predecessors, (430), 48 states have call successors, (48), 13 states have call predecessors, (48), 12 states have return successors, (46), 45 states have call predecessors, (46), 46 states have call successors, (46) [2022-11-16 20:10:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 524 transitions. [2022-11-16 20:10:06,595 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 524 transitions. Word has length 64 [2022-11-16 20:10:06,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:06,596 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 524 transitions. [2022-11-16 20:10:06,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 20:10:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 524 transitions. [2022-11-16 20:10:06,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:06,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:06,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:06,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:10:06,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:06,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1571274786, now seen corresponding path program 1 times [2022-11-16 20:10:06,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:06,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163718010] [2022-11-16 20:10:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:06,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:06,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:06,957 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:10:06,957 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:06,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163718010] [2022-11-16 20:10:06,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163718010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:06,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289495139] [2022-11-16 20:10:06,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:06,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:06,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:06,962 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:06,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:10:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 929 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:07,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 20:10:07,446 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289495139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:07,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:07,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:10:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48008839] [2022-11-16 20:10:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:07,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:07,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:07,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:07,451 INFO L87 Difference]: Start difference. First operand 343 states and 524 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:07,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:07,661 INFO L93 Difference]: Finished difference Result 1012 states and 1573 transitions. [2022-11-16 20:10:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:07,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:07,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:07,669 INFO L225 Difference]: With dead ends: 1012 [2022-11-16 20:10:07,669 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 20:10:07,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:07,674 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 225 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:07,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 503 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:10:07,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 20:10:07,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 668. [2022-11-16 20:10:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 555 states have (on average 1.5225225225225225) internal successors, (845), 559 states have internal predecessors, (845), 88 states have call successors, (88), 25 states have call predecessors, (88), 24 states have return successors, (86), 84 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-16 20:10:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 1019 transitions. [2022-11-16 20:10:07,752 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 1019 transitions. Word has length 129 [2022-11-16 20:10:07,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:07,753 INFO L495 AbstractCegarLoop]: Abstraction has 668 states and 1019 transitions. [2022-11-16 20:10:07,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 2 states have internal predecessors, (104), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:07,754 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 1019 transitions. [2022-11-16 20:10:07,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:07,770 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:07,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:07,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:07,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:07,980 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:07,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:07,980 INFO L85 PathProgramCache]: Analyzing trace with hash 269620188, now seen corresponding path program 1 times [2022-11-16 20:10:07,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:07,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615716543] [2022-11-16 20:10:07,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:07,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:08,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:10:08,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:08,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615716543] [2022-11-16 20:10:08,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615716543] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322182720] [2022-11-16 20:10:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:08,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:08,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:08,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:08,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 20:10:08,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:08,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:08,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:08,522 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-16 20:10:08,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:08,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322182720] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:08,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:08,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:10:08,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957741751] [2022-11-16 20:10:08,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:08,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:08,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:08,526 INFO L87 Difference]: Start difference. First operand 668 states and 1019 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:08,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:08,743 INFO L93 Difference]: Finished difference Result 1981 states and 3074 transitions. [2022-11-16 20:10:08,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:08,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:08,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:08,759 INFO L225 Difference]: With dead ends: 1981 [2022-11-16 20:10:08,759 INFO L226 Difference]: Without dead ends: 1318 [2022-11-16 20:10:08,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:08,767 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 249 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:08,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 491 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:08,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-11-16 20:10:08,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1310. [2022-11-16 20:10:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1095 states have (on average 1.5187214611872146) internal successors, (1663), 1101 states have internal predecessors, (1663), 166 states have call successors, (166), 49 states have call predecessors, (166), 48 states have return successors, (164), 160 states have call predecessors, (164), 164 states have call successors, (164) [2022-11-16 20:10:08,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 1993 transitions. [2022-11-16 20:10:08,915 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 1993 transitions. Word has length 129 [2022-11-16 20:10:08,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:08,916 INFO L495 AbstractCegarLoop]: Abstraction has 1310 states and 1993 transitions. [2022-11-16 20:10:08,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:08,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 1993 transitions. [2022-11-16 20:10:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:08,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:08,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:08,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:09,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:09,134 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:09,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:09,135 INFO L85 PathProgramCache]: Analyzing trace with hash 439307738, now seen corresponding path program 1 times [2022-11-16 20:10:09,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464658966] [2022-11-16 20:10:09,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:09,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:10:09,274 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464658966] [2022-11-16 20:10:09,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464658966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:09,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124816074] [2022-11-16 20:10:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:09,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:09,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:09,277 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:09,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 20:10:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:09,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:09,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:09,601 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 20:10:09,601 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:09,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124816074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:09,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:09,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:10:09,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520357730] [2022-11-16 20:10:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:09,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:09,604 INFO L87 Difference]: Start difference. First operand 1310 states and 1993 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:09,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:09,864 INFO L93 Difference]: Finished difference Result 3895 states and 6026 transitions. [2022-11-16 20:10:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:09,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:09,881 INFO L225 Difference]: With dead ends: 3895 [2022-11-16 20:10:09,882 INFO L226 Difference]: Without dead ends: 2590 [2022-11-16 20:10:09,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:09,895 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 237 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:09,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 476 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2022-11-16 20:10:10,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2578. [2022-11-16 20:10:10,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2163 states have (on average 1.514100785945446) internal successors, (3275), 2173 states have internal predecessors, (3275), 318 states have call successors, (318), 97 states have call predecessors, (318), 96 states have return successors, (316), 308 states have call predecessors, (316), 316 states have call successors, (316) [2022-11-16 20:10:10,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 3909 transitions. [2022-11-16 20:10:10,097 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 3909 transitions. Word has length 129 [2022-11-16 20:10:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:10,098 INFO L495 AbstractCegarLoop]: Abstraction has 2578 states and 3909 transitions. [2022-11-16 20:10:10,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:10,098 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 3909 transitions. [2022-11-16 20:10:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:10,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:10,114 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:10,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:10,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:10,323 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:10,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1589974232, now seen corresponding path program 1 times [2022-11-16 20:10:10,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:10,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020230264] [2022-11-16 20:10:10,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:10,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:10,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-16 20:10:10,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:10,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020230264] [2022-11-16 20:10:10,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020230264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:10,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472094476] [2022-11-16 20:10:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:10,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:10,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:10,454 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:10,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 20:10:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:10,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:10,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 20:10:10,749 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:10,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472094476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:10,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:10,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:10:10,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889258327] [2022-11-16 20:10:10,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:10,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:10,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:10,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:10,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:10,753 INFO L87 Difference]: Start difference. First operand 2578 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:11,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:11,161 INFO L93 Difference]: Finished difference Result 7675 states and 11830 transitions. [2022-11-16 20:10:11,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:11,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:11,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:11,189 INFO L225 Difference]: With dead ends: 7675 [2022-11-16 20:10:11,189 INFO L226 Difference]: Without dead ends: 5102 [2022-11-16 20:10:11,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:11,203 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 252 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:11,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 500 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 20:10:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5102 states. [2022-11-16 20:10:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5102 to 5082. [2022-11-16 20:10:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5082 states, 4275 states have (on average 1.5090058479532165) internal successors, (6451), 4293 states have internal predecessors, (6451), 614 states have call successors, (614), 193 states have call predecessors, (614), 192 states have return successors, (612), 596 states have call predecessors, (612), 612 states have call successors, (612) [2022-11-16 20:10:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5082 states to 5082 states and 7677 transitions. [2022-11-16 20:10:11,468 INFO L78 Accepts]: Start accepts. Automaton has 5082 states and 7677 transitions. Word has length 129 [2022-11-16 20:10:11,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:11,469 INFO L495 AbstractCegarLoop]: Abstraction has 5082 states and 7677 transitions. [2022-11-16 20:10:11,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:11,469 INFO L276 IsEmpty]: Start isEmpty. Operand 5082 states and 7677 transitions. [2022-11-16 20:10:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:11,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:11,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:11,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:11,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:11,687 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:11,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1575268890, now seen corresponding path program 1 times [2022-11-16 20:10:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:11,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084966357] [2022-11-16 20:10:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:11,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:10:11,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084966357] [2022-11-16 20:10:11,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084966357] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:11,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256759008] [2022-11-16 20:10:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:11,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:11,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:11,819 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:11,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 20:10:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:12,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:12,183 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 20:10:12,183 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:12,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256759008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:12,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:12,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2022-11-16 20:10:12,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880431829] [2022-11-16 20:10:12,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:12,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:12,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:12,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:12,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:12,185 INFO L87 Difference]: Start difference. First operand 5082 states and 7677 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:12,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:12,712 INFO L93 Difference]: Finished difference Result 15139 states and 23238 transitions. [2022-11-16 20:10:12,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:12,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:12,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:12,770 INFO L225 Difference]: With dead ends: 15139 [2022-11-16 20:10:12,770 INFO L226 Difference]: Without dead ends: 10062 [2022-11-16 20:10:12,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 20:10:12,791 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 231 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:12,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 465 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:12,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10062 states. [2022-11-16 20:10:13,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10062 to 10026. [2022-11-16 20:10:13,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10026 states, 8451 states have (on average 1.5036090403502544) internal successors, (12707), 8485 states have internal predecessors, (12707), 1190 states have call successors, (1190), 385 states have call predecessors, (1190), 384 states have return successors, (1188), 1156 states have call predecessors, (1188), 1188 states have call successors, (1188) [2022-11-16 20:10:13,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10026 states to 10026 states and 15085 transitions. [2022-11-16 20:10:13,516 INFO L78 Accepts]: Start accepts. Automaton has 10026 states and 15085 transitions. Word has length 129 [2022-11-16 20:10:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:13,517 INFO L495 AbstractCegarLoop]: Abstraction has 10026 states and 15085 transitions. [2022-11-16 20:10:13,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 10026 states and 15085 transitions. [2022-11-16 20:10:13,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:13,538 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:13,538 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:13,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-16 20:10:13,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:13,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:13,746 INFO L85 PathProgramCache]: Analyzing trace with hash 472059800, now seen corresponding path program 1 times [2022-11-16 20:10:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:13,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302547055] [2022-11-16 20:10:13,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:13,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 20:10:13,865 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302547055] [2022-11-16 20:10:13,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302547055] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:10:13,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940377656] [2022-11-16 20:10:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:13,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:13,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:10:13,867 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:10:13,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 20:10:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:14,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 20:10:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:10:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-16 20:10:14,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 20:10:14,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940377656] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:14,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 20:10:14,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2022-11-16 20:10:14,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435930357] [2022-11-16 20:10:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 20:10:14,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 20:10:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:14,160 INFO L87 Difference]: Start difference. First operand 10026 states and 15085 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:15,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:15,250 INFO L93 Difference]: Finished difference Result 29875 states and 45654 transitions. [2022-11-16 20:10:15,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 20:10:15,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 129 [2022-11-16 20:10:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:15,387 INFO L225 Difference]: With dead ends: 29875 [2022-11-16 20:10:15,387 INFO L226 Difference]: Without dead ends: 19854 [2022-11-16 20:10:15,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:10:15,440 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 243 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:15,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 465 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 20:10:15,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19854 states. [2022-11-16 20:10:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19854 to 19786. [2022-11-16 20:10:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19786 states, 16707 states have (on average 1.4979948524570539) internal successors, (25027), 16773 states have internal predecessors, (25027), 2310 states have call successors, (2310), 769 states have call predecessors, (2310), 768 states have return successors, (2308), 2244 states have call predecessors, (2308), 2308 states have call successors, (2308) [2022-11-16 20:10:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19786 states to 19786 states and 29645 transitions. [2022-11-16 20:10:16,714 INFO L78 Accepts]: Start accepts. Automaton has 19786 states and 29645 transitions. Word has length 129 [2022-11-16 20:10:16,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:16,714 INFO L495 AbstractCegarLoop]: Abstraction has 19786 states and 29645 transitions. [2022-11-16 20:10:16,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 2 states have internal predecessors, (86), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 20:10:16,714 INFO L276 IsEmpty]: Start isEmpty. Operand 19786 states and 29645 transitions. [2022-11-16 20:10:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-11-16 20:10:16,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:16,759 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:16,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 20:10:16,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1456e93c-b339-47fc-bcb8-3c3dfa4db1fd/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:10:16,966 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:16,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:16,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1799036950, now seen corresponding path program 1 times [2022-11-16 20:10:16,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:16,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408541350] [2022-11-16 20:10:16,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:16,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:10:17,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408541350] [2022-11-16 20:10:17,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408541350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:17,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:17,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:10:17,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919533333] [2022-11-16 20:10:17,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:17,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:10:17,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:10:17,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:10:17,767 INFO L87 Difference]: Start difference. First operand 19786 states and 29645 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:20,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:20,366 INFO L93 Difference]: Finished difference Result 53874 states and 80851 transitions. [2022-11-16 20:10:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:10:20,366 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 129 [2022-11-16 20:10:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:20,581 INFO L225 Difference]: With dead ends: 53874 [2022-11-16 20:10:20,581 INFO L226 Difference]: Without dead ends: 34094 [2022-11-16 20:10:20,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:10:20,656 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 855 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:20,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 978 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:10:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34094 states. [2022-11-16 20:10:22,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34094 to 29418. [2022-11-16 20:10:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29418 states, 24835 states have (on average 1.4934970807328367) internal successors, (37091), 24933 states have internal predecessors, (37091), 3430 states have call successors, (3430), 1153 states have call predecessors, (3430), 1152 states have return successors, (3428), 3332 states have call predecessors, (3428), 3428 states have call successors, (3428) [2022-11-16 20:10:22,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29418 states to 29418 states and 43949 transitions. [2022-11-16 20:10:22,769 INFO L78 Accepts]: Start accepts. Automaton has 29418 states and 43949 transitions. Word has length 129 [2022-11-16 20:10:22,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:22,770 INFO L495 AbstractCegarLoop]: Abstraction has 29418 states and 43949 transitions. [2022-11-16 20:10:22,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:22,771 INFO L276 IsEmpty]: Start isEmpty. Operand 29418 states and 43949 transitions. [2022-11-16 20:10:22,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-16 20:10:22,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:22,825 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:22,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 20:10:22,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:22,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:22,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1130149504, now seen corresponding path program 1 times [2022-11-16 20:10:22,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:22,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342888555] [2022-11-16 20:10:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:22,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:10:23,663 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342888555] [2022-11-16 20:10:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342888555] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:23,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:23,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:10:23,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946837237] [2022-11-16 20:10:23,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:23,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:10:23,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:23,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:10:23,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:10:23,667 INFO L87 Difference]: Start difference. First operand 29418 states and 43949 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:27,748 INFO L93 Difference]: Finished difference Result 98226 states and 147156 transitions. [2022-11-16 20:10:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:10:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 130 [2022-11-16 20:10:27,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:28,082 INFO L225 Difference]: With dead ends: 98226 [2022-11-16 20:10:28,082 INFO L226 Difference]: Without dead ends: 68814 [2022-11-16 20:10:28,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:10:28,182 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 952 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:28,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 680 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 20:10:28,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68814 states. [2022-11-16 20:10:32,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68814 to 57674. [2022-11-16 20:10:32,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57674 states, 48707 states have (on average 1.4874863982589772) internal successors, (72451), 48901 states have internal predecessors, (72451), 6662 states have call successors, (6662), 2305 states have call predecessors, (6662), 2304 states have return successors, (6660), 6468 states have call predecessors, (6660), 6660 states have call successors, (6660) [2022-11-16 20:10:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57674 states to 57674 states and 85773 transitions. [2022-11-16 20:10:33,099 INFO L78 Accepts]: Start accepts. Automaton has 57674 states and 85773 transitions. Word has length 130 [2022-11-16 20:10:33,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:33,100 INFO L495 AbstractCegarLoop]: Abstraction has 57674 states and 85773 transitions. [2022-11-16 20:10:33,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:33,101 INFO L276 IsEmpty]: Start isEmpty. Operand 57674 states and 85773 transitions. [2022-11-16 20:10:33,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-11-16 20:10:33,246 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:33,246 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 20:10:33,247 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:33,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:33,248 INFO L85 PathProgramCache]: Analyzing trace with hash -8422186, now seen corresponding path program 1 times [2022-11-16 20:10:33,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:33,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991629821] [2022-11-16 20:10:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:33,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:10:34,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:34,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991629821] [2022-11-16 20:10:34,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991629821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:34,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:34,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:10:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553495503] [2022-11-16 20:10:34,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:10:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:10:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:10:34,158 INFO L87 Difference]: Start difference. First operand 57674 states and 85773 transitions. Second operand has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:42,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:10:42,433 INFO L93 Difference]: Finished difference Result 187218 states and 279700 transitions. [2022-11-16 20:10:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 20:10:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 131 [2022-11-16 20:10:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:10:43,257 INFO L225 Difference]: With dead ends: 187218 [2022-11-16 20:10:43,258 INFO L226 Difference]: Without dead ends: 129550 [2022-11-16 20:10:43,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-16 20:10:43,489 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 914 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 934 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 20:10:43,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [934 Valid, 624 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 20:10:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129550 states. [2022-11-16 20:10:50,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129550 to 113034. [2022-11-16 20:10:51,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113034 states, 95491 states have (on average 1.4812181252683498) internal successors, (141443), 95877 states have internal predecessors, (141443), 12934 states have call successors, (12934), 4609 states have call predecessors, (12934), 4608 states have return successors, (12932), 12548 states have call predecessors, (12932), 12932 states have call successors, (12932) [2022-11-16 20:10:51,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113034 states to 113034 states and 167309 transitions. [2022-11-16 20:10:51,727 INFO L78 Accepts]: Start accepts. Automaton has 113034 states and 167309 transitions. Word has length 131 [2022-11-16 20:10:51,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:10:51,728 INFO L495 AbstractCegarLoop]: Abstraction has 113034 states and 167309 transitions. [2022-11-16 20:10:51,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.666666666666666) internal successors, (76), 6 states have internal predecessors, (76), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-16 20:10:51,728 INFO L276 IsEmpty]: Start isEmpty. Operand 113034 states and 167309 transitions. [2022-11-16 20:10:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-16 20:10:51,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:10:51,902 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 20:10:51,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 20:10:51,902 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:10:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:10:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2087633856, now seen corresponding path program 1 times [2022-11-16 20:10:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:10:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464979085] [2022-11-16 20:10:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:10:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:10:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:10:52,971 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 20:10:52,972 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:10:52,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464979085] [2022-11-16 20:10:52,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464979085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:10:52,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:10:52,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 20:10:52,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049355080] [2022-11-16 20:10:52,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:10:52,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:10:52,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:10:52,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:10:52,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-16 20:10:52,975 INFO L87 Difference]: Start difference. First operand 113034 states and 167309 transitions. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8)