./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS --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 b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 --- 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-8393723 [2022-11-19 06:42:26,979 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:42:26,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:42:27,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:42:27,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:42:27,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:42:27,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:42:27,032 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:42:27,034 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:42:27,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:42:27,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:42:27,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:42:27,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:42:27,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:42:27,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:42:27,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:42:27,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:42:27,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:42:27,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:42:27,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:42:27,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:42:27,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:42:27,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:42:27,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:42:27,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:42:27,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:42:27,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:42:27,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:42:27,082 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:42:27,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:42:27,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:42:27,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:42:27,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:42:27,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:42:27,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:42:27,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:42:27,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:42:27,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:42:27,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:42:27,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:42:27,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:42:27,093 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:42:27,135 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:42:27,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:42:27,136 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:42:27,136 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:42:27,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:42:27,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:42:27,137 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:42:27,137 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:42:27,138 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:42:27,138 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:42:27,139 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:42:27,139 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:42:27,139 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:42:27,139 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:42:27,140 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:42:27,140 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:42:27,140 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:42:27,140 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:42:27,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:42:27,141 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:42:27,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:42:27,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:42:27,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:42:27,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:42:27,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:42:27,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:42:27,144 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:42:27,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:42:27,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:42:27,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:42:27,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:42:27,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:42:27,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:42:27,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:42:27,146 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:42:27,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:42:27,147 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:42:27,147 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:42:27,147 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:42:27,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:42:27,148 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:42:27,148 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_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b77809112787d30d81c7c3c0f8f2a230e1ec99494e3dfc2397bd48db4468ad64 [2022-11-19 06:42:27,411 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:42:27,430 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:42:27,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:42:27,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:42:27,435 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:42:27,436 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2022-11-19 06:42:27,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/data/463f4ac35/3c3cfecca96d4ccc91e603abb18f65d1/FLAGd27a2b6a3 [2022-11-19 06:42:28,096 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:42:28,097 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2022-11-19 06:42:28,112 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/data/463f4ac35/3c3cfecca96d4ccc91e603abb18f65d1/FLAGd27a2b6a3 [2022-11-19 06:42:28,401 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/data/463f4ac35/3c3cfecca96d4ccc91e603abb18f65d1 [2022-11-19 06:42:28,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:42:28,405 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:42:28,410 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:42:28,410 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:42:28,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:42:28,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:28" (1/1) ... [2022-11-19 06:42:28,417 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8019eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:28, skipping insertion in model container [2022-11-19 06:42:28,417 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:42:28" (1/1) ... [2022-11-19 06:42:28,425 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:42:28,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:42:28,708 WARN L234 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_bde1bf87-a6d5-4a79-afce-78aadd79f3db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2022-11-19 06:42:28,752 WARN L234 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_bde1bf87-a6d5-4a79-afce-78aadd79f3db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2022-11-19 06:42:28,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:42:28,915 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:42:28,938 WARN L234 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_bde1bf87-a6d5-4a79-afce-78aadd79f3db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[913,926] [2022-11-19 06:42:28,964 WARN L234 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_bde1bf87-a6d5-4a79-afce-78aadd79f3db/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.13.cil-2.c[5977,5990] [2022-11-19 06:42:29,058 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:42:29,093 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:42:29,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29 WrapperNode [2022-11-19 06:42:29,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:42:29,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:42:29,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:42:29,095 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:42:29,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,117 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,192 INFO L138 Inliner]: procedures = 74, calls = 87, calls flagged for inlining = 49, calls inlined = 49, statements flattened = 1113 [2022-11-19 06:42:29,192 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:42:29,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:42:29,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:42:29,194 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:42:29,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,203 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,222 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,243 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:42:29,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:42:29,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:42:29,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:42:29,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (1/1) ... [2022-11-19 06:42:29,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:42:29,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:29,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:42:29,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:42:29,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 06:42:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 06:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2022-11-19 06:42:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2022-11-19 06:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-11-19 06:42:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-11-19 06:42:29,352 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-11-19 06:42:29,352 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-11-19 06:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-11-19 06:42:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-11-19 06:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-11-19 06:42:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-11-19 06:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-11-19 06:42:29,353 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-11-19 06:42:29,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-11-19 06:42:29,354 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-11-19 06:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:42:29,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:42:29,354 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-11-19 06:42:29,354 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-11-19 06:42:29,511 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:42:29,521 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:42:30,588 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:42:31,276 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:42:31,276 INFO L300 CfgBuilder]: Removed 20 assume(true) statements. [2022-11-19 06:42:31,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:31 BoogieIcfgContainer [2022-11-19 06:42:31,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:42:31,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:42:31,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:42:31,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:42:31,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:42:28" (1/3) ... [2022-11-19 06:42:31,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1631d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:31, skipping insertion in model container [2022-11-19 06:42:31,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:42:29" (2/3) ... [2022-11-19 06:42:31,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1631d70d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:42:31, skipping insertion in model container [2022-11-19 06:42:31,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:42:31" (3/3) ... [2022-11-19 06:42:31,292 INFO L112 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.13.cil-2.c [2022-11-19 06:42:31,311 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:42:31,312 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-19 06:42:31,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:42:31,402 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;@6933a60e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:42:31,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-19 06:42:31,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 250 states, 205 states have (on average 1.5658536585365854) internal successors, (321), 210 states have internal predecessors, (321), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-19 06:42:31,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-19 06:42:31,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:31,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:42:31,426 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:31,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1481077984, now seen corresponding path program 1 times [2022-11-19 06:42:31,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512478592] [2022-11-19 06:42:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:31,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:31,756 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512478592] [2022-11-19 06:42:31,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512478592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:31,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:31,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:31,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770007077] [2022-11-19 06:42:31,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:31,810 INFO L87 Difference]: Start difference. First operand has 250 states, 205 states have (on average 1.5658536585365854) internal successors, (321), 210 states have internal predecessors, (321), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:32,093 INFO L93 Difference]: Finished difference Result 533 states and 822 transitions. [2022-11-19 06:42:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:32,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-19 06:42:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:32,107 INFO L225 Difference]: With dead ends: 533 [2022-11-19 06:42:32,114 INFO L226 Difference]: Without dead ends: 283 [2022-11-19 06:42:32,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,148 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 354 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:32,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 383 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-11-19 06:42:32,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 279. [2022-11-19 06:42:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 231 states have (on average 1.5064935064935066) internal successors, (348), 234 states have internal predecessors, (348), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-11-19 06:42:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 418 transitions. [2022-11-19 06:42:32,217 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 418 transitions. Word has length 28 [2022-11-19 06:42:32,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:32,217 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 418 transitions. [2022-11-19 06:42:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 418 transitions. [2022-11-19 06:42:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 06:42:32,220 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:32,220 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] [2022-11-19 06:42:32,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:42:32,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:32,222 INFO L85 PathProgramCache]: Analyzing trace with hash 492568876, now seen corresponding path program 1 times [2022-11-19 06:42:32,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:32,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775179755] [2022-11-19 06:42:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:32,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:32,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:32,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775179755] [2022-11-19 06:42:32,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775179755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:32,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:32,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100678949] [2022-11-19 06:42:32,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,298 INFO L87 Difference]: Start difference. First operand 279 states and 418 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:32,458 INFO L93 Difference]: Finished difference Result 435 states and 635 transitions. [2022-11-19 06:42:32,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-19 06:42:32,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:32,462 INFO L225 Difference]: With dead ends: 435 [2022-11-19 06:42:32,462 INFO L226 Difference]: Without dead ends: 354 [2022-11-19 06:42:32,463 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,464 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 352 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:32,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 368 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:32,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-19 06:42:32,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 350. [2022-11-19 06:42:32,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 291 states have (on average 1.4742268041237114) internal successors, (429), 294 states have internal predecessors, (429), 43 states have call successors, (43), 15 states have call predecessors, (43), 14 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-11-19 06:42:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 513 transitions. [2022-11-19 06:42:32,500 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 513 transitions. Word has length 29 [2022-11-19 06:42:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:32,500 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 513 transitions. [2022-11-19 06:42:32,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 513 transitions. [2022-11-19 06:42:32,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 06:42:32,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:32,503 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] [2022-11-19 06:42:32,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 06:42:32,503 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:32,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:32,504 INFO L85 PathProgramCache]: Analyzing trace with hash -620601224, now seen corresponding path program 1 times [2022-11-19 06:42:32,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097037719] [2022-11-19 06:42:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:32,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:32,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097037719] [2022-11-19 06:42:32,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097037719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:32,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:32,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:32,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985945753] [2022-11-19 06:42:32,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:32,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:32,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:32,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,583 INFO L87 Difference]: Start difference. First operand 350 states and 513 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:32,770 INFO L93 Difference]: Finished difference Result 590 states and 841 transitions. [2022-11-19 06:42:32,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:32,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-11-19 06:42:32,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:32,774 INFO L225 Difference]: With dead ends: 590 [2022-11-19 06:42:32,774 INFO L226 Difference]: Without dead ends: 438 [2022-11-19 06:42:32,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,784 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 46 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:32,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 621 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-19 06:42:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 424. [2022-11-19 06:42:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 354 states have (on average 1.4519774011299436) internal successors, (514), 359 states have internal predecessors, (514), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-19 06:42:32,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 610 transitions. [2022-11-19 06:42:32,837 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 610 transitions. Word has length 30 [2022-11-19 06:42:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:32,837 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 610 transitions. [2022-11-19 06:42:32,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 06:42:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 610 transitions. [2022-11-19 06:42:32,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-19 06:42:32,850 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:32,850 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:42:32,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 06:42:32,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 97514159, now seen corresponding path program 1 times [2022-11-19 06:42:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498832608] [2022-11-19 06:42:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:32,982 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 06:42:32,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:32,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498832608] [2022-11-19 06:42:32,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498832608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:32,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:32,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:32,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632001786] [2022-11-19 06:42:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:32,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:32,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:32,985 INFO L87 Difference]: Start difference. First operand 424 states and 610 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:42:33,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:33,191 INFO L93 Difference]: Finished difference Result 587 states and 828 transitions. [2022-11-19 06:42:33,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:33,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 43 [2022-11-19 06:42:33,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:33,195 INFO L225 Difference]: With dead ends: 587 [2022-11-19 06:42:33,196 INFO L226 Difference]: Without dead ends: 429 [2022-11-19 06:42:33,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:33,198 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 32 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:33,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 653 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:33,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-11-19 06:42:33,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 418. [2022-11-19 06:42:33,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 348 states have (on average 1.4367816091954022) internal successors, (500), 353 states have internal predecessors, (500), 49 states have call successors, (49), 20 states have call predecessors, (49), 19 states have return successors, (47), 45 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-19 06:42:33,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 596 transitions. [2022-11-19 06:42:33,237 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 596 transitions. Word has length 43 [2022-11-19 06:42:33,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:33,238 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 596 transitions. [2022-11-19 06:42:33,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:42:33,238 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 596 transitions. [2022-11-19 06:42:33,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-19 06:42:33,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:33,240 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:42:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 06:42:33,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:33,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -475587275, now seen corresponding path program 1 times [2022-11-19 06:42:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:33,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847608167] [2022-11-19 06:42:33,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:33,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:33,293 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 06:42:33,293 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:33,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847608167] [2022-11-19 06:42:33,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847608167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:33,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:33,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:42:33,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465757425] [2022-11-19 06:42:33,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:33,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:42:33,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:33,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:42:33,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:33,296 INFO L87 Difference]: Start difference. First operand 418 states and 596 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:42:33,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:33,434 INFO L93 Difference]: Finished difference Result 667 states and 920 transitions. [2022-11-19 06:42:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:42:33,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2022-11-19 06:42:33,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:33,439 INFO L225 Difference]: With dead ends: 667 [2022-11-19 06:42:33,439 INFO L226 Difference]: Without dead ends: 464 [2022-11-19 06:42:33,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:42:33,446 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 338 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:33,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 366 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:42:33,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-11-19 06:42:33,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-11-19 06:42:33,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 387 states have (on average 1.4031007751937985) internal successors, (543), 392 states have internal predecessors, (543), 53 states have call successors, (53), 23 states have call predecessors, (53), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-19 06:42:33,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 647 transitions. [2022-11-19 06:42:33,492 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 647 transitions. Word has length 46 [2022-11-19 06:42:33,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:33,492 INFO L495 AbstractCegarLoop]: Abstraction has 464 states and 647 transitions. [2022-11-19 06:42:33,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 06:42:33,493 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 647 transitions. [2022-11-19 06:42:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-19 06:42:33,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:33,495 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:42:33,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 06:42:33,496 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:33,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 52469695, now seen corresponding path program 1 times [2022-11-19 06:42:33,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:33,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961617523] [2022-11-19 06:42:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:33,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:42:33,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:33,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961617523] [2022-11-19 06:42:33,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961617523] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:42:33,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:42:33,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 06:42:33,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725184457] [2022-11-19 06:42:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:42:33,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 06:42:33,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:42:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 06:42:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:42:33,602 INFO L87 Difference]: Start difference. First operand 464 states and 647 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:42:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:42:33,908 INFO L93 Difference]: Finished difference Result 504 states and 694 transitions. [2022-11-19 06:42:33,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 06:42:33,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-11-19 06:42:33,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:42:33,912 INFO L225 Difference]: With dead ends: 504 [2022-11-19 06:42:33,912 INFO L226 Difference]: Without dead ends: 501 [2022-11-19 06:42:33,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:42:33,914 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 616 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:42:33,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 364 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:42:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-11-19 06:42:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 463. [2022-11-19 06:42:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 387 states have (on average 1.3979328165374676) internal successors, (541), 391 states have internal predecessors, (541), 52 states have call successors, (52), 23 states have call predecessors, (52), 22 states have return successors, (51), 49 states have call predecessors, (51), 51 states have call successors, (51) [2022-11-19 06:42:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 644 transitions. [2022-11-19 06:42:33,957 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 644 transitions. Word has length 47 [2022-11-19 06:42:33,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:42:33,958 INFO L495 AbstractCegarLoop]: Abstraction has 463 states and 644 transitions. [2022-11-19 06:42:33,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-19 06:42:33,958 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 644 transitions. [2022-11-19 06:42:33,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-19 06:42:33,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:42:33,960 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-19 06:42:33,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 06:42:33,960 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:42:33,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:42:33,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1625094008, now seen corresponding path program 1 times [2022-11-19 06:42:33,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:42:33,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114633858] [2022-11-19 06:42:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:33,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:42:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:42:34,129 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:42:34,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114633858] [2022-11-19 06:42:34,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114633858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:42:34,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096346368] [2022-11-19 06:42:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:42:34,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:42:34,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:42:34,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:42:34,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:42:34,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:42:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 06:42:34,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:42:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:42:34,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:42:34,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-19 06:42:34,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096346368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:42:34,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [546242117] [2022-11-19 06:42:34,851 INFO L159 IcfgInterpreter]: Started Sifa with 40 locations of interest [2022-11-19 06:42:34,852 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:42:34,856 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:42:34,861 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:42:34,862 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:42:42,302 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 195 for LOIs [2022-11-19 06:42:42,331 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 210 for LOIs [2022-11-19 06:42:42,365 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify_threads with input of size 436 for LOIs [2022-11-19 06:42:51,090 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:43:07,472 WARN L233 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 425 DAG size of output: 323 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:16,751 WARN L233 SmtUtils]: Spent 8.58s on a formula simplification. DAG size of input: 436 DAG size of output: 337 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:26,705 WARN L233 SmtUtils]: Spent 8.71s on a formula simplification. DAG size of input: 443 DAG size of output: 341 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:34,756 WARN L233 SmtUtils]: Spent 7.83s on a formula simplification. DAG size of input: 459 DAG size of output: 414 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:43,233 WARN L233 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 463 DAG size of output: 416 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 06:43:56,632 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8718#(and (= ~E_12~0 2) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~T11_E~0 2) (= ~t10_i~0 0) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_13~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (= ~t13_st~0 0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~E_10~0 2) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~E_11~0 2) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (<= ~p_num_write~0 1) (= ~m_i~0 0) (= ~t10_st~0 0) (= ~t10_pc~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~t11_pc~0 0) (<= 0 (+ ~q_buf_0~0 2147483648)) (= ~p_dw_pc~0 1) (= ~T12_E~0 2) (= ~t11_i~0 0) (= ~T13_E~0 2) (= ~q_write_ev~0 2) (= ~t12_pc~0 0) (= ~E_2~0 2) (= ~p_dw_st~0 0) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~t12_i~0 0) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~t13_i~0 0) (= ~token~0 0) (= ~q_read_ev~0 2) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~T10_E~0 2) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (<= ~p_last_write~0 2147483647) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= ~t12_st~0 0) (= 0 ~t4_pc~0) (= ~t13_pc~0 0) (= ~t11_st~0 0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2022-11-19 06:43:56,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:43:56,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:43:56,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2022-11-19 06:43:56,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723752681] [2022-11-19 06:43:56,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:43:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:43:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:43:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 06:43:56,636 INFO L87 Difference]: Start difference. First operand 463 states and 644 transitions. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:43:57,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:57,213 INFO L93 Difference]: Finished difference Result 906 states and 1212 transitions. [2022-11-19 06:43:57,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 06:43:57,214 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 48 [2022-11-19 06:43:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:57,219 INFO L225 Difference]: With dead ends: 906 [2022-11-19 06:43:57,219 INFO L226 Difference]: Without dead ends: 903 [2022-11-19 06:43:57,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 65.5s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-11-19 06:43:57,221 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 495 mSDsluCounter, 967 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:57,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 1344 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 06:43:57,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-11-19 06:43:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 672. [2022-11-19 06:43:57,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 564 states have (on average 1.372340425531915) internal successors, (774), 570 states have internal predecessors, (774), 71 states have call successors, (71), 36 states have call predecessors, (71), 35 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-19 06:43:57,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 915 transitions. [2022-11-19 06:43:57,282 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 915 transitions. Word has length 48 [2022-11-19 06:43:57,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:57,282 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 915 transitions. [2022-11-19 06:43:57,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 6 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-19 06:43:57,283 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 915 transitions. [2022-11-19 06:43:57,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-19 06:43:57,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:57,285 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-19 06:43:57,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:43:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:43:57,491 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1191833174, now seen corresponding path program 2 times [2022-11-19 06:43:57,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:57,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297686054] [2022-11-19 06:43:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:57,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-19 06:43:57,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:57,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297686054] [2022-11-19 06:43:57,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297686054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:57,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:57,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 06:43:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027315276] [2022-11-19 06:43:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:57,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:43:57,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:57,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:43:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:57,560 INFO L87 Difference]: Start difference. First operand 672 states and 915 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:43:57,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:57,706 INFO L93 Difference]: Finished difference Result 1002 states and 1348 transitions. [2022-11-19 06:43:57,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:43:57,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 61 [2022-11-19 06:43:57,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:57,710 INFO L225 Difference]: With dead ends: 1002 [2022-11-19 06:43:57,710 INFO L226 Difference]: Without dead ends: 614 [2022-11-19 06:43:57,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:43:57,712 INFO L413 NwaCegarLoop]: 334 mSDtfsCounter, 351 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:57,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 379 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:57,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-19 06:43:57,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 605. [2022-11-19 06:43:57,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 507 states have (on average 1.3668639053254439) internal successors, (693), 514 states have internal predecessors, (693), 65 states have call successors, (65), 32 states have call predecessors, (65), 31 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-11-19 06:43:57,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 822 transitions. [2022-11-19 06:43:57,763 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 822 transitions. Word has length 61 [2022-11-19 06:43:57,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:57,763 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 822 transitions. [2022-11-19 06:43:57,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-19 06:43:57,764 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 822 transitions. [2022-11-19 06:43:57,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-19 06:43:57,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:57,766 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, 1, 1, 1, 1, 1, 1] [2022-11-19 06:43:57,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 06:43:57,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:57,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:57,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1437366064, now seen corresponding path program 1 times [2022-11-19 06:43:57,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:57,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016671125] [2022-11-19 06:43:57,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:57,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:43:57,927 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016671125] [2022-11-19 06:43:57,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016671125] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:57,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:43:57,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 06:43:57,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853499809] [2022-11-19 06:43:57,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:57,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 06:43:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:57,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 06:43:57,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 06:43:57,930 INFO L87 Difference]: Start difference. First operand 605 states and 822 transitions. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:43:59,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:59,113 INFO L93 Difference]: Finished difference Result 1538 states and 2378 transitions. [2022-11-19 06:43:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:43:59,114 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 70 [2022-11-19 06:43:59,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:59,120 INFO L225 Difference]: With dead ends: 1538 [2022-11-19 06:43:59,121 INFO L226 Difference]: Without dead ends: 1346 [2022-11-19 06:43:59,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 06:43:59,123 INFO L413 NwaCegarLoop]: 628 mSDtfsCounter, 1533 mSDsluCounter, 888 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1551 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:59,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1551 Valid, 1516 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 06:43:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-11-19 06:43:59,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1335. [2022-11-19 06:43:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1335 states, 1124 states have (on average 1.458185053380783) internal successors, (1639), 1134 states have internal predecessors, (1639), 154 states have call successors, (154), 56 states have call predecessors, (154), 55 states have return successors, (219), 145 states have call predecessors, (219), 153 states have call successors, (219) [2022-11-19 06:43:59,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1335 states to 1335 states and 2012 transitions. [2022-11-19 06:43:59,236 INFO L78 Accepts]: Start accepts. Automaton has 1335 states and 2012 transitions. Word has length 70 [2022-11-19 06:43:59,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:59,236 INFO L495 AbstractCegarLoop]: Abstraction has 1335 states and 2012 transitions. [2022-11-19 06:43:59,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 06:43:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1335 states and 2012 transitions. [2022-11-19 06:43:59,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 06:43:59,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:59,239 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-19 06:43:59,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 06:43:59,239 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:43:59,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:43:59,240 INFO L85 PathProgramCache]: Analyzing trace with hash 515604744, now seen corresponding path program 1 times [2022-11-19 06:43:59,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:43:59,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072688010] [2022-11-19 06:43:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:43:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:43:59,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:43:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072688010] [2022-11-19 06:43:59,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072688010] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:43:59,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109300679] [2022-11-19 06:43:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:43:59,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:43:59,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:43:59,423 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:43:59,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:43:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:43:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:43:59,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:43:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:43:59,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:43:59,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109300679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:43:59,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:43:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 06:43:59,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459452306] [2022-11-19 06:43:59,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:43:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:43:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:43:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:43:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:59,623 INFO L87 Difference]: Start difference. First operand 1335 states and 2012 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:43:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:43:59,819 INFO L93 Difference]: Finished difference Result 1462 states and 2171 transitions. [2022-11-19 06:43:59,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:43:59,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 73 [2022-11-19 06:43:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:43:59,827 INFO L225 Difference]: With dead ends: 1462 [2022-11-19 06:43:59,827 INFO L226 Difference]: Without dead ends: 928 [2022-11-19 06:43:59,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:43:59,831 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 25 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:43:59,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 624 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:43:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-11-19 06:43:59,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-11-19 06:43:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 781 states have (on average 1.5326504481434058) internal successors, (1197), 785 states have internal predecessors, (1197), 116 states have call successors, (116), 30 states have call predecessors, (116), 30 states have return successors, (182), 113 states have call predecessors, (182), 116 states have call successors, (182) [2022-11-19 06:43:59,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 1495 transitions. [2022-11-19 06:43:59,913 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 1495 transitions. Word has length 73 [2022-11-19 06:43:59,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:43:59,913 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 1495 transitions. [2022-11-19 06:43:59,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-19 06:43:59,914 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 1495 transitions. [2022-11-19 06:43:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:43:59,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:43:59,917 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, 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] [2022-11-19 06:43:59,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:00,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 06:44:00,124 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash -211721960, now seen corresponding path program 1 times [2022-11-19 06:44:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:00,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366315723] [2022-11-19 06:44:00,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:00,324 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:00,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366315723] [2022-11-19 06:44:00,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366315723] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:00,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856180253] [2022-11-19 06:44:00,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:00,331 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:00,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:44:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:00,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:00,668 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-19 06:44:00,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:00,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856180253] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:00,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:00,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:00,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346429953] [2022-11-19 06:44:00,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:00,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:00,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:00,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:00,671 INFO L87 Difference]: Start difference. First operand 928 states and 1495 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:00,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:00,945 INFO L93 Difference]: Finished difference Result 2756 states and 4576 transitions. [2022-11-19 06:44:00,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:00,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:00,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:00,957 INFO L225 Difference]: With dead ends: 2756 [2022-11-19 06:44:00,957 INFO L226 Difference]: Without dead ends: 1834 [2022-11-19 06:44:00,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:00,963 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 271 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:00,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 516 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:00,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1834 states. [2022-11-19 06:44:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1834 to 1827. [2022-11-19 06:44:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1827 states, 1543 states have (on average 1.5294880103694102) internal successors, (2360), 1550 states have internal predecessors, (2360), 223 states have call successors, (223), 60 states have call predecessors, (223), 60 states have return successors, (351), 217 states have call predecessors, (351), 223 states have call successors, (351) [2022-11-19 06:44:01,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 2934 transitions. [2022-11-19 06:44:01,125 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 2934 transitions. Word has length 143 [2022-11-19 06:44:01,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:01,125 INFO L495 AbstractCegarLoop]: Abstraction has 1827 states and 2934 transitions. [2022-11-19 06:44:01,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:01,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 2934 transitions. [2022-11-19 06:44:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:01,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:01,132 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, 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] [2022-11-19 06:44:01,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:01,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:01,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:01,340 INFO L85 PathProgramCache]: Analyzing trace with hash -553942502, now seen corresponding path program 1 times [2022-11-19 06:44:01,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:01,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905111802] [2022-11-19 06:44:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:01,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:01,555 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:01,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:01,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905111802] [2022-11-19 06:44:01,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905111802] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:01,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094903248] [2022-11-19 06:44:01,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:01,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:01,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:01,558 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:01,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:44:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:01,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:01,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 06:44:01,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:01,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094903248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:01,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:01,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:01,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987926741] [2022-11-19 06:44:01,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:01,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:01,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:01,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:01,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:01,967 INFO L87 Difference]: Start difference. First operand 1827 states and 2934 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:02,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:02,380 INFO L93 Difference]: Finished difference Result 5438 states and 8994 transitions. [2022-11-19 06:44:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:02,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:02,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:02,405 INFO L225 Difference]: With dead ends: 5438 [2022-11-19 06:44:02,405 INFO L226 Difference]: Without dead ends: 3617 [2022-11-19 06:44:02,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:02,416 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 247 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:02,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:02,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2022-11-19 06:44:02,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3605. [2022-11-19 06:44:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3052 states have (on average 1.525557011795544) internal successors, (4656), 3065 states have internal predecessors, (4656), 432 states have call successors, (432), 120 states have call predecessors, (432), 120 states have return successors, (680), 420 states have call predecessors, (680), 432 states have call successors, (680) [2022-11-19 06:44:02,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5768 transitions. [2022-11-19 06:44:02,763 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5768 transitions. Word has length 143 [2022-11-19 06:44:02,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:02,763 INFO L495 AbstractCegarLoop]: Abstraction has 3605 states and 5768 transitions. [2022-11-19 06:44:02,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:02,765 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5768 transitions. [2022-11-19 06:44:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:02,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:02,773 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, 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] [2022-11-19 06:44:02,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:02,980 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:02,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1013315300, now seen corresponding path program 1 times [2022-11-19 06:44:02,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:02,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096769973] [2022-11-19 06:44:02,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:02,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:03,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:03,206 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:03,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096769973] [2022-11-19 06:44:03,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096769973] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:03,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943494115] [2022-11-19 06:44:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:03,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:03,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:03,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:03,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:44:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:03,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:03,542 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-19 06:44:03,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:03,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943494115] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:03,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:03,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:03,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167572555] [2022-11-19 06:44:03,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:03,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:03,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:03,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:03,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:03,545 INFO L87 Difference]: Start difference. First operand 3605 states and 5768 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:04,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:04,218 INFO L93 Difference]: Finished difference Result 10742 states and 17689 transitions. [2022-11-19 06:44:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:04,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:04,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:04,264 INFO L225 Difference]: With dead ends: 10742 [2022-11-19 06:44:04,264 INFO L226 Difference]: Without dead ends: 7143 [2022-11-19 06:44:04,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:04,350 INFO L413 NwaCegarLoop]: 275 mSDtfsCounter, 277 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:04,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 516 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2022-11-19 06:44:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7121. [2022-11-19 06:44:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7121 states, 6040 states have (on average 1.5211920529801324) internal successors, (9188), 6065 states have internal predecessors, (9188), 840 states have call successors, (840), 240 states have call predecessors, (840), 240 states have return successors, (1320), 816 states have call predecessors, (1320), 840 states have call successors, (1320) [2022-11-19 06:44:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 11348 transitions. [2022-11-19 06:44:05,026 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 11348 transitions. Word has length 143 [2022-11-19 06:44:05,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:05,028 INFO L495 AbstractCegarLoop]: Abstraction has 7121 states and 11348 transitions. [2022-11-19 06:44:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 11348 transitions. [2022-11-19 06:44:05,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:05,040 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:05,040 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, 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] [2022-11-19 06:44:05,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:05,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-19 06:44:05,247 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 723771550, now seen corresponding path program 1 times [2022-11-19 06:44:05,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:05,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290126690] [2022-11-19 06:44:05,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:05,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:05,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:05,425 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:05,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290126690] [2022-11-19 06:44:05,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290126690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:05,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415576999] [2022-11-19 06:44:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:05,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:05,428 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:05,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:44:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:05,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 1100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:05,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:05,790 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:44:05,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:05,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415576999] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:05,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:05,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:05,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107366706] [2022-11-19 06:44:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:05,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:05,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:05,793 INFO L87 Difference]: Start difference. First operand 7121 states and 11348 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:07,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:07,105 INFO L93 Difference]: Finished difference Result 21230 states and 34797 transitions. [2022-11-19 06:44:07,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:07,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:07,183 INFO L225 Difference]: With dead ends: 21230 [2022-11-19 06:44:07,183 INFO L226 Difference]: Without dead ends: 14115 [2022-11-19 06:44:07,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:07,213 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 256 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:07,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2022-11-19 06:44:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 14073. [2022-11-19 06:44:08,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14073 states, 11956 states have (on average 1.5165607226497155) internal successors, (18132), 12005 states have internal predecessors, (18132), 1636 states have call successors, (1636), 480 states have call predecessors, (1636), 480 states have return successors, (2564), 1588 states have call predecessors, (2564), 1636 states have call successors, (2564) [2022-11-19 06:44:08,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14073 states to 14073 states and 22332 transitions. [2022-11-19 06:44:08,530 INFO L78 Accepts]: Start accepts. Automaton has 14073 states and 22332 transitions. Word has length 143 [2022-11-19 06:44:08,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:08,531 INFO L495 AbstractCegarLoop]: Abstraction has 14073 states and 22332 transitions. [2022-11-19 06:44:08,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:08,532 INFO L276 IsEmpty]: Start isEmpty. Operand 14073 states and 22332 transitions. [2022-11-19 06:44:08,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:08,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:08,555 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, 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] [2022-11-19 06:44:08,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 06:44:08,763 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:08,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:08,764 INFO L85 PathProgramCache]: Analyzing trace with hash 998251484, now seen corresponding path program 1 times [2022-11-19 06:44:08,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:08,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752465070] [2022-11-19 06:44:08,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:08,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:08,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:08,959 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:08,959 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752465070] [2022-11-19 06:44:08,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752465070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:08,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836320725] [2022-11-19 06:44:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:08,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:08,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:08,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:08,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:44:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:09,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 1094 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 06:44:09,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:09,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836320725] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:09,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:09,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:09,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262287839] [2022-11-19 06:44:09,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:09,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:09,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:09,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:09,331 INFO L87 Difference]: Start difference. First operand 14073 states and 22332 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:11,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:11,778 INFO L93 Difference]: Finished difference Result 41966 states and 68449 transitions. [2022-11-19 06:44:11,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:11,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:11,905 INFO L225 Difference]: With dead ends: 41966 [2022-11-19 06:44:11,905 INFO L226 Difference]: Without dead ends: 27899 [2022-11-19 06:44:11,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:11,954 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 250 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:11,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27899 states. [2022-11-19 06:44:14,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27899 to 27817. [2022-11-19 06:44:14,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27817 states, 23668 states have (on average 1.5117458171370628) internal successors, (35780), 23765 states have internal predecessors, (35780), 3188 states have call successors, (3188), 960 states have call predecessors, (3188), 960 states have return successors, (4980), 3092 states have call predecessors, (4980), 3188 states have call successors, (4980) [2022-11-19 06:44:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27817 states to 27817 states and 43948 transitions. [2022-11-19 06:44:14,265 INFO L78 Accepts]: Start accepts. Automaton has 27817 states and 43948 transitions. Word has length 143 [2022-11-19 06:44:14,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:14,265 INFO L495 AbstractCegarLoop]: Abstraction has 27817 states and 43948 transitions. [2022-11-19 06:44:14,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:14,266 INFO L276 IsEmpty]: Start isEmpty. Operand 27817 states and 43948 transitions. [2022-11-19 06:44:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:14,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:14,303 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, 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] [2022-11-19 06:44:14,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:14,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 06:44:14,520 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash -410968678, now seen corresponding path program 1 times [2022-11-19 06:44:14,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:14,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452793378] [2022-11-19 06:44:14,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:14,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:14,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:14,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452793378] [2022-11-19 06:44:14,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452793378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:14,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043278547] [2022-11-19 06:44:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:14,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:14,691 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:14,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:44:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:14,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:14,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 06:44:15,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043278547] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:15,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:15,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073089287] [2022-11-19 06:44:15,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:15,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:15,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:15,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:15,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:15,038 INFO L87 Difference]: Start difference. First operand 27817 states and 43948 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:19,151 INFO L93 Difference]: Finished difference Result 82958 states and 134625 transitions. [2022-11-19 06:44:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:19,151 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:19,596 INFO L225 Difference]: With dead ends: 82958 [2022-11-19 06:44:19,597 INFO L226 Difference]: Without dead ends: 55147 [2022-11-19 06:44:19,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:19,701 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 262 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:19,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:44:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55147 states. [2022-11-19 06:44:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55147 to 54985. [2022-11-19 06:44:23,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54985 states, 46852 states have (on average 1.506787330316742) internal successors, (70596), 47045 states have internal predecessors, (70596), 6212 states have call successors, (6212), 1920 states have call predecessors, (6212), 1920 states have return successors, (9668), 6020 states have call predecessors, (9668), 6212 states have call successors, (9668) [2022-11-19 06:44:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54985 states to 54985 states and 86476 transitions. [2022-11-19 06:44:24,057 INFO L78 Accepts]: Start accepts. Automaton has 54985 states and 86476 transitions. Word has length 143 [2022-11-19 06:44:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:44:24,057 INFO L495 AbstractCegarLoop]: Abstraction has 54985 states and 86476 transitions. [2022-11-19 06:44:24,057 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 54985 states and 86476 transitions. [2022-11-19 06:44:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-19 06:44:24,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:44:24,136 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, 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] [2022-11-19 06:44:24,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 06:44:24,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-19 06:44:24,353 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:44:24,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:44:24,354 INFO L85 PathProgramCache]: Analyzing trace with hash 575107672, now seen corresponding path program 1 times [2022-11-19 06:44:24,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:44:24,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605232352] [2022-11-19 06:44:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:24,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:44:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:24,590 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 06:44:24,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:44:24,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605232352] [2022-11-19 06:44:24,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605232352] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:44:24,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184138059] [2022-11-19 06:44:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:44:24,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:44:24,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:44:24,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:44:24,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bde1bf87-a6d5-4a79-afce-78aadd79f3db/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 06:44:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:44:24,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1082 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:44:24,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:44:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-19 06:44:24,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:44:24,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184138059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:44:24,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:44:24,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 06:44:24,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318921404] [2022-11-19 06:44:24,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:44:24,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:44:24,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:44:24,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:44:24,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:24,924 INFO L87 Difference]: Start difference. First operand 54985 states and 86476 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 06:44:32,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:44:32,207 INFO L93 Difference]: Finished difference Result 163982 states and 264721 transitions. [2022-11-19 06:44:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:44:32,207 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, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 143 [2022-11-19 06:44:32,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:44:32,721 INFO L225 Difference]: With dead ends: 163982 [2022-11-19 06:44:32,722 INFO L226 Difference]: Without dead ends: 109003 [2022-11-19 06:44:32,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 06:44:32,969 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 268 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:44:32,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 513 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:44:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109003 states.