./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.03.cil-1.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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.03.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/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 e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 --- 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 07:17:31,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:17:31,031 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:17:31,050 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:17:31,050 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:17:31,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:17:31,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:17:31,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:17:31,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:17:31,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:17:31,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:17:31,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:17:31,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:17:31,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:17:31,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:17:31,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:17:31,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:17:31,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:17:31,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:17:31,069 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:17:31,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:17:31,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:17:31,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:17:31,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:17:31,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:17:31,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:17:31,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:17:31,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:17:31,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:17:31,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:17:31,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:17:31,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:17:31,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:17:31,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:17:31,085 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:17:31,085 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:17:31,086 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:17:31,086 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:17:31,086 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:17:31,087 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:17:31,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:17:31,089 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 07:17:31,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:17:31,112 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:17:31,112 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:17:31,113 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:17:31,113 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:17:31,113 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:17:31,114 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:17:31,114 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:17:31,114 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:17:31,114 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:17:31,115 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:17:31,115 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:17:31,115 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:17:31,115 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:17:31,116 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:17:31,116 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:17:31,116 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:17:31,116 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:17:31,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:17:31,117 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:17:31,117 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:17:31,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:17:31,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:17:31,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 07:17:31,118 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:17:31,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 07:17:31,119 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:17:31,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 07:17:31,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:17:31,120 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 07:17:31,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:17:31,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:17:31,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:17:31,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:17:31,121 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:17:31,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:17:31,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 07:17:31,121 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:17:31,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:17:31,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 07:17:31,122 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:17:31,122 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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 [2022-11-19 07:17:31,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:17:31,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:17:31,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:17:31,437 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:17:31,438 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:17:31,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2022-11-19 07:17:31,548 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/data/f860cd7da/4e13dfd69391426991bee18a31dd344f/FLAG85d2d3f67 [2022-11-19 07:17:32,084 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:17:32,085 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2022-11-19 07:17:32,102 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/data/f860cd7da/4e13dfd69391426991bee18a31dd344f/FLAG85d2d3f67 [2022-11-19 07:17:32,434 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/data/f860cd7da/4e13dfd69391426991bee18a31dd344f [2022-11-19 07:17:32,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:17:32,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:17:32,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:17:32,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:17:32,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:17:32,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55fd38f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32, skipping insertion in model container [2022-11-19 07:17:32,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,455 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:17:32,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:17:32,675 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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2022-11-19 07:17:32,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:17:32,741 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:17:32,753 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_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/sv-benchmarks/c/systemc/token_ring.03.cil-1.c[671,684] [2022-11-19 07:17:32,783 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:17:32,797 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:17:32,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32 WrapperNode [2022-11-19 07:17:32,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:17:32,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:17:32,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:17:32,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:17:32,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,847 INFO L138 Inliner]: procedures = 34, calls = 41, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 336 [2022-11-19 07:17:32,847 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:17:32,848 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:17:32,848 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:17:32,848 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:17:32,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,916 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,918 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:17:32,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:17:32,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:17:32,923 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:17:32,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (1/1) ... [2022-11-19 07:17:32,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:17:32,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:32,972 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:17:33,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:17:33,021 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:17:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-19 07:17:33,022 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-19 07:17:33,022 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-19 07:17:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-19 07:17:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-19 07:17:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-19 07:17:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-19 07:17:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-19 07:17:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-19 07:17:33,023 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-19 07:17:33,023 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-19 07:17:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-19 07:17:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:17:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-19 07:17:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-19 07:17:33,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:17:33,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:17:33,137 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:17:33,139 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:17:33,632 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:17:33,867 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:17:33,867 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 07:17:33,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:33 BoogieIcfgContainer [2022-11-19 07:17:33,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:17:33,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:17:33,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:17:33,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:17:33,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:17:32" (1/3) ... [2022-11-19 07:17:33,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de67cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:33, skipping insertion in model container [2022-11-19 07:17:33,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:17:32" (2/3) ... [2022-11-19 07:17:33,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6de67cd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:17:33, skipping insertion in model container [2022-11-19 07:17:33,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:33" (3/3) ... [2022-11-19 07:17:33,883 INFO L112 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-1.c [2022-11-19 07:17:33,902 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:17:33,902 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 07:17:33,958 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:17:33,965 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;@47aaef59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:17:33,965 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 07:17:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 95 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 71 states have internal predecessors, (102), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 07:17:33,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 07:17:33,995 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:33,996 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] [2022-11-19 07:17:33,997 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:34,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:34,004 INFO L85 PathProgramCache]: Analyzing trace with hash -43680876, now seen corresponding path program 1 times [2022-11-19 07:17:34,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:34,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706925195] [2022-11-19 07:17:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:34,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:34,465 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 07:17:34,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:34,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706925195] [2022-11-19 07:17:34,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706925195] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:34,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:34,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:17:34,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491049736] [2022-11-19 07:17:34,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:34,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:34,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:34,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:34,503 INFO L87 Difference]: Start difference. First operand has 95 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 71 states have internal predecessors, (102), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:17:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:34,842 INFO L93 Difference]: Finished difference Result 262 states and 393 transitions. [2022-11-19 07:17:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:17:34,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-19 07:17:34,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:34,854 INFO L225 Difference]: With dead ends: 262 [2022-11-19 07:17:34,854 INFO L226 Difference]: Without dead ends: 168 [2022-11-19 07:17:34,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:34,862 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 223 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:34,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 318 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:17:34,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-19 07:17:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-11-19 07:17:34,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 122 states have (on average 1.4262295081967213) internal successors, (174), 125 states have internal predecessors, (174), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-11-19 07:17:34,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 236 transitions. [2022-11-19 07:17:34,921 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 236 transitions. Word has length 40 [2022-11-19 07:17:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:34,922 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 236 transitions. [2022-11-19 07:17:34,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-19 07:17:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 236 transitions. [2022-11-19 07:17:34,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:17:34,926 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:34,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 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 07:17:34,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:17:34,927 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:34,928 INFO L85 PathProgramCache]: Analyzing trace with hash 131735209, now seen corresponding path program 1 times [2022-11-19 07:17:34,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:34,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2592760] [2022-11-19 07:17:34,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:34,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:17:35,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:35,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2592760] [2022-11-19 07:17:35,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2592760] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:35,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021674650] [2022-11-19 07:17:35,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:35,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:35,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:35,190 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:35,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:17:35,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:35,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-19 07:17:35,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021674650] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:35,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:35,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:17:35,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898676821] [2022-11-19 07:17:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:35,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:35,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:35,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:35,466 INFO L87 Difference]: Start difference. First operand 167 states and 236 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:17:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:35,600 INFO L93 Difference]: Finished difference Result 484 states and 693 transitions. [2022-11-19 07:17:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-19 07:17:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:35,611 INFO L225 Difference]: With dead ends: 484 [2022-11-19 07:17:35,612 INFO L226 Difference]: Without dead ends: 322 [2022-11-19 07:17:35,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 07:17:35,622 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 108 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:35,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 247 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:35,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-19 07:17:35,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 316. [2022-11-19 07:17:35,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 235 states have (on average 1.4170212765957446) internal successors, (333), 239 states have internal predecessors, (333), 56 states have call successors, (56), 25 states have call predecessors, (56), 24 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-19 07:17:35,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 443 transitions. [2022-11-19 07:17:35,694 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 443 transitions. Word has length 73 [2022-11-19 07:17:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:35,695 INFO L495 AbstractCegarLoop]: Abstraction has 316 states and 443 transitions. [2022-11-19 07:17:35,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:17:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 443 transitions. [2022-11-19 07:17:35,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:17:35,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:35,706 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, 1, 1, 1, 1, 1, 1, 1, 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 07:17:35,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:35,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:35,907 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:35,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:35,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1300515093, now seen corresponding path program 1 times [2022-11-19 07:17:35,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:35,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268741342] [2022-11-19 07:17:35,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:35,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:17:36,042 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:36,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268741342] [2022-11-19 07:17:36,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268741342] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:36,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016081087] [2022-11-19 07:17:36,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:36,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:36,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:36,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:36,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:17:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:36,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:36,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:17:36,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:36,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016081087] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:36,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:36,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-11-19 07:17:36,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430988449] [2022-11-19 07:17:36,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:36,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:36,255 INFO L87 Difference]: Start difference. First operand 316 states and 443 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:17:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:36,421 INFO L93 Difference]: Finished difference Result 925 states and 1314 transitions. [2022-11-19 07:17:36,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:36,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-11-19 07:17:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:36,427 INFO L225 Difference]: With dead ends: 925 [2022-11-19 07:17:36,427 INFO L226 Difference]: Without dead ends: 614 [2022-11-19 07:17:36,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 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 07:17:36,434 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 105 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:36,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 217 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:36,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-11-19 07:17:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 606. [2022-11-19 07:17:36,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 455 states have (on average 1.4043956043956043) internal successors, (639), 461 states have internal predecessors, (639), 102 states have call successors, (102), 49 states have call predecessors, (102), 48 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-19 07:17:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 841 transitions. [2022-11-19 07:17:36,504 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 841 transitions. Word has length 73 [2022-11-19 07:17:36,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:36,505 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 841 transitions. [2022-11-19 07:17:36,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 2 states have internal predecessors, (48), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-19 07:17:36,505 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 841 transitions. [2022-11-19 07:17:36,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-19 07:17:36,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:36,512 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, 1, 1, 1, 1, 1, 1, 1, 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 07:17:36,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 07:17:36,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-19 07:17:36,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:36,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:36,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1506858473, now seen corresponding path program 1 times [2022-11-19 07:17:36,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:36,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679763403] [2022-11-19 07:17:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:36,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:36,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:17:37,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679763403] [2022-11-19 07:17:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679763403] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:37,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:17:37,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250605348] [2022-11-19 07:17:37,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:37,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:17:37,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:37,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:17:37,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:37,129 INFO L87 Difference]: Start difference. First operand 606 states and 841 transitions. Second operand has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:17:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:37,565 INFO L93 Difference]: Finished difference Result 1918 states and 2664 transitions. [2022-11-19 07:17:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:17:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 73 [2022-11-19 07:17:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:37,579 INFO L225 Difference]: With dead ends: 1918 [2022-11-19 07:17:37,579 INFO L226 Difference]: Without dead ends: 1318 [2022-11-19 07:17:37,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:37,584 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 353 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:37,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 311 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 07:17:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-11-19 07:17:37,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1154. [2022-11-19 07:17:37,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 867 states have (on average 1.3875432525951557) internal successors, (1203), 877 states have internal predecessors, (1203), 190 states have call successors, (190), 97 states have call predecessors, (190), 96 states have return successors, (188), 180 states have call predecessors, (188), 188 states have call successors, (188) [2022-11-19 07:17:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1581 transitions. [2022-11-19 07:17:37,722 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1581 transitions. Word has length 73 [2022-11-19 07:17:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:37,723 INFO L495 AbstractCegarLoop]: Abstraction has 1154 states and 1581 transitions. [2022-11-19 07:17:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.0) internal successors, (42), 6 states have internal predecessors, (42), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-11-19 07:17:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1581 transitions. [2022-11-19 07:17:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-19 07:17:37,729 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:37,729 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, 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] [2022-11-19 07:17:37,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:17:37,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:37,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1606998081, now seen corresponding path program 1 times [2022-11-19 07:17:37,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:37,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758953344] [2022-11-19 07:17:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:37,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:37,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-19 07:17:37,981 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758953344] [2022-11-19 07:17:37,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758953344] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:37,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150181586] [2022-11-19 07:17:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:37,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:38,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:17:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:38,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:38,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:38,150 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 07:17:38,150 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:38,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150181586] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:38,150 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:38,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:38,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616820164] [2022-11-19 07:17:38,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:38,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:38,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:38,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:38,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:38,153 INFO L87 Difference]: Start difference. First operand 1154 states and 1581 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:17:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:38,313 INFO L93 Difference]: Finished difference Result 2041 states and 2834 transitions. [2022-11-19 07:17:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 86 [2022-11-19 07:17:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:38,322 INFO L225 Difference]: With dead ends: 2041 [2022-11-19 07:17:38,322 INFO L226 Difference]: Without dead ends: 1437 [2022-11-19 07:17:38,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:38,325 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 45 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:38,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 269 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-11-19 07:17:38,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1306. [2022-11-19 07:17:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1003 states have (on average 1.4147557328015952) internal successors, (1419), 1013 states have internal predecessors, (1419), 198 states have call successors, (198), 105 states have call predecessors, (198), 104 states have return successors, (196), 188 states have call predecessors, (196), 196 states have call successors, (196) [2022-11-19 07:17:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1813 transitions. [2022-11-19 07:17:38,444 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1813 transitions. Word has length 86 [2022-11-19 07:17:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:38,444 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 1813 transitions. [2022-11-19 07:17:38,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-19 07:17:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1813 transitions. [2022-11-19 07:17:38,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-19 07:17:38,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:38,456 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-11-19 07:17:38,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:38,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:38,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:38,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:38,662 INFO L85 PathProgramCache]: Analyzing trace with hash -36299811, now seen corresponding path program 1 times [2022-11-19 07:17:38,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:38,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196243383] [2022-11-19 07:17:38,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:38,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-19 07:17:38,723 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:38,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196243383] [2022-11-19 07:17:38,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196243383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:38,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:38,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:17:38,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381759230] [2022-11-19 07:17:38,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:38,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:38,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:38,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:38,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:17:38,726 INFO L87 Difference]: Start difference. First operand 1306 states and 1813 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:38,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:38,939 INFO L93 Difference]: Finished difference Result 3255 states and 4546 transitions. [2022-11-19 07:17:38,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 96 [2022-11-19 07:17:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:38,950 INFO L225 Difference]: With dead ends: 3255 [2022-11-19 07:17:38,951 INFO L226 Difference]: Without dead ends: 1954 [2022-11-19 07:17:38,956 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 07:17:38,957 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 101 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:38,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 247 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:38,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-11-19 07:17:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1938. [2022-11-19 07:17:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1491 states have (on average 1.3997317236753857) internal successors, (2087), 1505 states have internal predecessors, (2087), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-19 07:17:39,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2665 transitions. [2022-11-19 07:17:39,084 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2665 transitions. Word has length 96 [2022-11-19 07:17:39,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:39,086 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2665 transitions. [2022-11-19 07:17:39,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:39,087 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2665 transitions. [2022-11-19 07:17:39,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:17:39,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:39,094 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:39,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:17:39,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:39,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:39,095 INFO L85 PathProgramCache]: Analyzing trace with hash 204609863, now seen corresponding path program 1 times [2022-11-19 07:17:39,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:39,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900440965] [2022-11-19 07:17:39,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:39,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:39,410 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:39,410 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:39,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900440965] [2022-11-19 07:17:39,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900440965] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:39,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081809227] [2022-11-19 07:17:39,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:39,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:39,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:39,415 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:39,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:17:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:39,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:39,618 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-19 07:17:39,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:39,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081809227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:39,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:39,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:39,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432102095] [2022-11-19 07:17:39,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:39,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:39,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:39,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:39,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:39,623 INFO L87 Difference]: Start difference. First operand 1938 states and 2665 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:39,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:39,834 INFO L93 Difference]: Finished difference Result 3250 states and 4567 transitions. [2022-11-19 07:17:39,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 109 [2022-11-19 07:17:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:39,843 INFO L225 Difference]: With dead ends: 3250 [2022-11-19 07:17:39,844 INFO L226 Difference]: Without dead ends: 1950 [2022-11-19 07:17:39,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:39,848 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 100 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:39,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 272 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:39,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2022-11-19 07:17:39,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 1930. [2022-11-19 07:17:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1483 states have (on average 1.3749157113958193) internal successors, (2039), 1497 states have internal predecessors, (2039), 290 states have call successors, (290), 157 states have call predecessors, (290), 156 states have return successors, (288), 276 states have call predecessors, (288), 288 states have call successors, (288) [2022-11-19 07:17:39,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 2617 transitions. [2022-11-19 07:17:39,974 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 2617 transitions. Word has length 109 [2022-11-19 07:17:39,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:39,974 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 2617 transitions. [2022-11-19 07:17:39,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:39,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 2617 transitions. [2022-11-19 07:17:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-19 07:17:39,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:39,981 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:39,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:40,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:40,186 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:40,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1450063045, now seen corresponding path program 1 times [2022-11-19 07:17:40,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:40,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386967129] [2022-11-19 07:17:40,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:40,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:40,470 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386967129] [2022-11-19 07:17:40,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386967129] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:40,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375191828] [2022-11-19 07:17:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:40,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:40,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:40,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:40,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 07:17:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:17:40,656 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:40,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375191828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:40,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:40,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138910377] [2022-11-19 07:17:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:40,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:40,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:40,658 INFO L87 Difference]: Start difference. First operand 1930 states and 2617 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:40,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:40,847 INFO L93 Difference]: Finished difference Result 3666 states and 4950 transitions. [2022-11-19 07:17:40,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:40,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 109 [2022-11-19 07:17:40,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:40,858 INFO L225 Difference]: With dead ends: 3666 [2022-11-19 07:17:40,858 INFO L226 Difference]: Without dead ends: 2378 [2022-11-19 07:17:40,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:40,863 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 110 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:40,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 144 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:40,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2378 states. [2022-11-19 07:17:40,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2378 to 2378. [2022-11-19 07:17:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 1867 states have (on average 1.3363685056239958) internal successors, (2495), 1881 states have internal predecessors, (2495), 310 states have call successors, (310), 201 states have call predecessors, (310), 200 states have return successors, (308), 296 states have call predecessors, (308), 308 states have call successors, (308) [2022-11-19 07:17:41,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 3113 transitions. [2022-11-19 07:17:41,012 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 3113 transitions. Word has length 109 [2022-11-19 07:17:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:41,012 INFO L495 AbstractCegarLoop]: Abstraction has 2378 states and 3113 transitions. [2022-11-19 07:17:41,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:41,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 3113 transitions. [2022-11-19 07:17:41,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:17:41,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:41,019 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:17:41,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:41,225 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:41,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1122209900, now seen corresponding path program 1 times [2022-11-19 07:17:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:41,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538415571] [2022-11-19 07:17:41,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:41,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:41,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538415571] [2022-11-19 07:17:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538415571] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926670291] [2022-11-19 07:17:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:41,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:41,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:41,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:41,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 07:17:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:41,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:41,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:17:41,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:41,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926670291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:41,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:41,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:41,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029965218] [2022-11-19 07:17:41,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:41,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:41,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:41,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:41,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:41,649 INFO L87 Difference]: Start difference. First operand 2378 states and 3113 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:41,919 INFO L93 Difference]: Finished difference Result 5582 states and 7388 transitions. [2022-11-19 07:17:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 110 [2022-11-19 07:17:41,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:41,934 INFO L225 Difference]: With dead ends: 5582 [2022-11-19 07:17:41,935 INFO L226 Difference]: Without dead ends: 3210 [2022-11-19 07:17:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:41,940 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 58 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:41,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 224 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:41,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3210 states. [2022-11-19 07:17:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3210 to 2606. [2022-11-19 07:17:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2606 states, 2067 states have (on average 1.3560716013546201) internal successors, (2803), 2082 states have internal predecessors, (2803), 324 states have call successors, (324), 215 states have call predecessors, (324), 214 states have return successors, (322), 309 states have call predecessors, (322), 322 states have call successors, (322) [2022-11-19 07:17:42,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2606 states to 2606 states and 3449 transitions. [2022-11-19 07:17:42,167 INFO L78 Accepts]: Start accepts. Automaton has 2606 states and 3449 transitions. Word has length 110 [2022-11-19 07:17:42,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:42,167 INFO L495 AbstractCegarLoop]: Abstraction has 2606 states and 3449 transitions. [2022-11-19 07:17:42,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:42,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2606 states and 3449 transitions. [2022-11-19 07:17:42,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-19 07:17:42,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:42,177 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:42,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:42,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:42,383 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash -645360395, now seen corresponding path program 1 times [2022-11-19 07:17:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:42,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485481331] [2022-11-19 07:17:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 29 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:17:42,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:42,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485481331] [2022-11-19 07:17:42,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485481331] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837295411] [2022-11-19 07:17:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:42,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:42,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:42,763 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:42,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 07:17:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:42,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:42,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:42,932 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:17:42,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:42,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837295411] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:42,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:42,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:42,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089651555] [2022-11-19 07:17:42,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:42,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:42,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:42,935 INFO L87 Difference]: Start difference. First operand 2606 states and 3449 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:43,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:43,196 INFO L93 Difference]: Finished difference Result 4902 states and 6557 transitions. [2022-11-19 07:17:43,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:43,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 110 [2022-11-19 07:17:43,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:43,210 INFO L225 Difference]: With dead ends: 4902 [2022-11-19 07:17:43,210 INFO L226 Difference]: Without dead ends: 3168 [2022-11-19 07:17:43,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:43,216 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:43,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 272 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2022-11-19 07:17:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2886. [2022-11-19 07:17:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2886 states, 2315 states have (on average 1.3801295896328294) internal successors, (3195), 2330 states have internal predecessors, (3195), 340 states have call successors, (340), 231 states have call predecessors, (340), 230 states have return successors, (338), 325 states have call predecessors, (338), 338 states have call successors, (338) [2022-11-19 07:17:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2886 states to 2886 states and 3873 transitions. [2022-11-19 07:17:43,440 INFO L78 Accepts]: Start accepts. Automaton has 2886 states and 3873 transitions. Word has length 110 [2022-11-19 07:17:43,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:43,441 INFO L495 AbstractCegarLoop]: Abstraction has 2886 states and 3873 transitions. [2022-11-19 07:17:43,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:43,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2886 states and 3873 transitions. [2022-11-19 07:17:43,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:17:43,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:43,450 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:43,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:43,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-19 07:17:43,656 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:43,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:43,657 INFO L85 PathProgramCache]: Analyzing trace with hash -506869221, now seen corresponding path program 1 times [2022-11-19 07:17:43,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:43,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239616530] [2022-11-19 07:17:43,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:43,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-19 07:17:43,758 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239616530] [2022-11-19 07:17:43,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239616530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:43,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791922389] [2022-11-19 07:17:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:43,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:43,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:43,760 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:43,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 07:17:43,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:43,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:17:43,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791922389] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:43,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:43,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-19 07:17:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371139756] [2022-11-19 07:17:43,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:43,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:43,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:43,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:43,941 INFO L87 Difference]: Start difference. First operand 2886 states and 3873 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:44,242 INFO L93 Difference]: Finished difference Result 5364 states and 7289 transitions. [2022-11-19 07:17:44,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:17:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:44,263 INFO L225 Difference]: With dead ends: 5364 [2022-11-19 07:17:44,263 INFO L226 Difference]: Without dead ends: 3880 [2022-11-19 07:17:44,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:44,268 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 66 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:44,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 289 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:44,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3880 states. [2022-11-19 07:17:44,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3880 to 3366. [2022-11-19 07:17:44,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 2731 states have (on average 1.3954595386305382) internal successors, (3811), 2746 states have internal predecessors, (3811), 372 states have call successors, (372), 263 states have call predecessors, (372), 262 states have return successors, (370), 357 states have call predecessors, (370), 370 states have call successors, (370) [2022-11-19 07:17:44,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4553 transitions. [2022-11-19 07:17:44,573 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4553 transitions. Word has length 111 [2022-11-19 07:17:44,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:44,574 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4553 transitions. [2022-11-19 07:17:44,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:44,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4553 transitions. [2022-11-19 07:17:44,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:17:44,584 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:44,584 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:44,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:44,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-19 07:17:44,791 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:44,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2026022575, now seen corresponding path program 1 times [2022-11-19 07:17:44,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:44,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394449430] [2022-11-19 07:17:44,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:44,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:17:45,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394449430] [2022-11-19 07:17:45,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394449430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:45,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138173492] [2022-11-19 07:17:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:45,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:45,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:45,236 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:45,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-19 07:17:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:45,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 07:17:45,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-19 07:17:45,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:45,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138173492] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:45,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:45,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-19 07:17:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454415958] [2022-11-19 07:17:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:45,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:45,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:45,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:45,409 INFO L87 Difference]: Start difference. First operand 3366 states and 4553 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:45,748 INFO L93 Difference]: Finished difference Result 6360 states and 8677 transitions. [2022-11-19 07:17:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:45,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 111 [2022-11-19 07:17:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:45,777 INFO L225 Difference]: With dead ends: 6360 [2022-11-19 07:17:45,778 INFO L226 Difference]: Without dead ends: 4628 [2022-11-19 07:17:45,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:45,783 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 72 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:45,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 294 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2022-11-19 07:17:46,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 4030. [2022-11-19 07:17:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4030 states, 3299 states have (on average 1.401333737496211) internal successors, (4623), 3314 states have internal predecessors, (4623), 420 states have call successors, (420), 311 states have call predecessors, (420), 310 states have return successors, (418), 405 states have call predecessors, (418), 418 states have call successors, (418) [2022-11-19 07:17:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4030 states to 4030 states and 5461 transitions. [2022-11-19 07:17:46,105 INFO L78 Accepts]: Start accepts. Automaton has 4030 states and 5461 transitions. Word has length 111 [2022-11-19 07:17:46,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:46,105 INFO L495 AbstractCegarLoop]: Abstraction has 4030 states and 5461 transitions. [2022-11-19 07:17:46,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:46,106 INFO L276 IsEmpty]: Start isEmpty. Operand 4030 states and 5461 transitions. [2022-11-19 07:17:46,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-19 07:17:46,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:46,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:17:46,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:46,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:46,322 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:46,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1566249774, now seen corresponding path program 1 times [2022-11-19 07:17:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:46,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552636211] [2022-11-19 07:17:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:46,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:17:46,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552636211] [2022-11-19 07:17:46,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552636211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:46,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182421901] [2022-11-19 07:17:46,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:46,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:46,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:46,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:46,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-19 07:17:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:46,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:17:46,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:46,836 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-19 07:17:46,836 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:46,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182421901] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:46,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:46,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-19 07:17:46,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509128772] [2022-11-19 07:17:46,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:46,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:17:46,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:46,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:17:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:46,838 INFO L87 Difference]: Start difference. First operand 4030 states and 5461 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:47,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:47,593 INFO L93 Difference]: Finished difference Result 9558 states and 12905 transitions. [2022-11-19 07:17:47,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:17:47,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 111 [2022-11-19 07:17:47,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:47,634 INFO L225 Difference]: With dead ends: 9558 [2022-11-19 07:17:47,636 INFO L226 Difference]: Without dead ends: 5534 [2022-11-19 07:17:47,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:47,644 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 295 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:47,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 316 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5534 states. [2022-11-19 07:17:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5534 to 5530. [2022-11-19 07:17:48,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5530 states, 4497 states have (on average 1.3718034245052257) internal successors, (6169), 4518 states have internal predecessors, (6169), 594 states have call successors, (594), 439 states have call predecessors, (594), 438 states have return successors, (592), 573 states have call predecessors, (592), 592 states have call successors, (592) [2022-11-19 07:17:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5530 states to 5530 states and 7355 transitions. [2022-11-19 07:17:48,231 INFO L78 Accepts]: Start accepts. Automaton has 5530 states and 7355 transitions. Word has length 111 [2022-11-19 07:17:48,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:48,232 INFO L495 AbstractCegarLoop]: Abstraction has 5530 states and 7355 transitions. [2022-11-19 07:17:48,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:48,232 INFO L276 IsEmpty]: Start isEmpty. Operand 5530 states and 7355 transitions. [2022-11-19 07:17:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-19 07:17:48,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:48,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:48,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:48,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:48,453 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:48,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2040537032, now seen corresponding path program 1 times [2022-11-19 07:17:48,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:48,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730381749] [2022-11-19 07:17:48,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:48,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:17:48,696 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:48,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730381749] [2022-11-19 07:17:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730381749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298169939] [2022-11-19 07:17:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:48,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:48,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:48,699 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:48,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-19 07:17:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-19 07:17:48,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:17:48,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:48,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298169939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:48,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:48,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-19 07:17:48,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074892529] [2022-11-19 07:17:48,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:48,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:17:48,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:48,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:17:48,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:17:48,938 INFO L87 Difference]: Start difference. First operand 5530 states and 7355 transitions. Second operand has 6 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:49,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:49,875 INFO L93 Difference]: Finished difference Result 13154 states and 17441 transitions. [2022-11-19 07:17:49,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:17:49,875 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 112 [2022-11-19 07:17:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:49,901 INFO L225 Difference]: With dead ends: 13154 [2022-11-19 07:17:49,901 INFO L226 Difference]: Without dead ends: 7630 [2022-11-19 07:17:49,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:49,913 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 387 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:49,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 241 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:17:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7630 states. [2022-11-19 07:17:50,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7630 to 7626. [2022-11-19 07:17:50,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7626 states, 6163 states have (on average 1.3439883173779004) internal successors, (8283), 6193 states have internal predecessors, (8283), 842 states have call successors, (842), 621 states have call predecessors, (842), 620 states have return successors, (840), 812 states have call predecessors, (840), 840 states have call successors, (840) [2022-11-19 07:17:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7626 states to 7626 states and 9965 transitions. [2022-11-19 07:17:50,627 INFO L78 Accepts]: Start accepts. Automaton has 7626 states and 9965 transitions. Word has length 112 [2022-11-19 07:17:50,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:50,627 INFO L495 AbstractCegarLoop]: Abstraction has 7626 states and 9965 transitions. [2022-11-19 07:17:50,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 3 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-19 07:17:50,627 INFO L276 IsEmpty]: Start isEmpty. Operand 7626 states and 9965 transitions. [2022-11-19 07:17:50,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:17:50,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:50,643 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:50,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:50,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-19 07:17:50,849 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:50,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1027860924, now seen corresponding path program 1 times [2022-11-19 07:17:50,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:50,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472080182] [2022-11-19 07:17:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:50,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:50,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472080182] [2022-11-19 07:17:50,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472080182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:50,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592836232] [2022-11-19 07:17:50,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:50,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:50,994 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:51,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-19 07:17:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:51,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-19 07:17:51,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-19 07:17:51,179 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:51,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592836232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:51,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:51,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 07:17:51,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850489621] [2022-11-19 07:17:51,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:51,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:17:51,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:17:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:17:51,181 INFO L87 Difference]: Start difference. First operand 7626 states and 9965 transitions. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:17:51,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:51,888 INFO L93 Difference]: Finished difference Result 10844 states and 14207 transitions. [2022-11-19 07:17:51,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:17:51,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 116 [2022-11-19 07:17:51,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:51,914 INFO L225 Difference]: With dead ends: 10844 [2022-11-19 07:17:51,915 INFO L226 Difference]: Without dead ends: 8099 [2022-11-19 07:17:51,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:51,923 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 114 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:51,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 452 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8099 states. [2022-11-19 07:17:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8099 to 7868. [2022-11-19 07:17:52,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7868 states, 6358 states have (on average 1.3413022963195973) internal successors, (8528), 6406 states have internal predecessors, (8528), 849 states have call successors, (849), 625 states have call predecessors, (849), 660 states have return successors, (883), 837 states have call predecessors, (883), 847 states have call successors, (883) [2022-11-19 07:17:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7868 states to 7868 states and 10260 transitions. [2022-11-19 07:17:52,902 INFO L78 Accepts]: Start accepts. Automaton has 7868 states and 10260 transitions. Word has length 116 [2022-11-19 07:17:52,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:52,903 INFO L495 AbstractCegarLoop]: Abstraction has 7868 states and 10260 transitions. [2022-11-19 07:17:52,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-19 07:17:52,904 INFO L276 IsEmpty]: Start isEmpty. Operand 7868 states and 10260 transitions. [2022-11-19 07:17:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:17:52,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:52,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:52,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:53,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-19 07:17:53,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:53,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:53,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1214171463, now seen corresponding path program 1 times [2022-11-19 07:17:53,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:53,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51467782] [2022-11-19 07:17:53,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:53,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 28 proven. 11 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:53,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51467782] [2022-11-19 07:17:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51467782] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:53,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993968078] [2022-11-19 07:17:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:53,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:53,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:53,207 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:53,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-19 07:17:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:53,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:53,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:17:53,381 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993968078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:53,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:53,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:17:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427419567] [2022-11-19 07:17:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:53,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:53,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:53,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:53,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:53,384 INFO L87 Difference]: Start difference. First operand 7868 states and 10260 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:53,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:53,945 INFO L93 Difference]: Finished difference Result 10679 states and 14043 transitions. [2022-11-19 07:17:53,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:53,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:17:53,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:53,968 INFO L225 Difference]: With dead ends: 10679 [2022-11-19 07:17:53,969 INFO L226 Difference]: Without dead ends: 7610 [2022-11-19 07:17:53,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:53,977 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 22 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:53,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 227 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7610 states. [2022-11-19 07:17:54,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7610 to 7163. [2022-11-19 07:17:54,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7163 states, 5761 states have (on average 1.341260197882312) internal successors, (7727), 5782 states have internal predecessors, (7727), 813 states have call successors, (813), 589 states have call predecessors, (813), 588 states have return successors, (811), 792 states have call predecessors, (811), 811 states have call successors, (811) [2022-11-19 07:17:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7163 states to 7163 states and 9351 transitions. [2022-11-19 07:17:54,405 INFO L78 Accepts]: Start accepts. Automaton has 7163 states and 9351 transitions. Word has length 117 [2022-11-19 07:17:54,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:54,405 INFO L495 AbstractCegarLoop]: Abstraction has 7163 states and 9351 transitions. [2022-11-19 07:17:54,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:54,405 INFO L276 IsEmpty]: Start isEmpty. Operand 7163 states and 9351 transitions. [2022-11-19 07:17:54,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:17:54,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:54,422 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:54,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:54,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:54,628 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:54,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:54,628 INFO L85 PathProgramCache]: Analyzing trace with hash 447601579, now seen corresponding path program 1 times [2022-11-19 07:17:54,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115818110] [2022-11-19 07:17:54,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:54,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 31 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-19 07:17:54,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115818110] [2022-11-19 07:17:54,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115818110] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:54,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593218835] [2022-11-19 07:17:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:54,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:54,831 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:54,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-19 07:17:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:54,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:17:54,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-19 07:17:55,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:55,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593218835] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:55,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:55,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:17:55,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619402599] [2022-11-19 07:17:55,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:55,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:55,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:55,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:17:55,046 INFO L87 Difference]: Start difference. First operand 7163 states and 9351 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:55,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:55,775 INFO L93 Difference]: Finished difference Result 13212 states and 17362 transitions. [2022-11-19 07:17:55,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:55,776 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 117 [2022-11-19 07:17:55,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:55,800 INFO L225 Difference]: With dead ends: 13212 [2022-11-19 07:17:55,800 INFO L226 Difference]: Without dead ends: 8190 [2022-11-19 07:17:55,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 119 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 07:17:55,813 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 85 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:55,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 160 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:17:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8190 states. [2022-11-19 07:17:56,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8190 to 8098. [2022-11-19 07:17:56,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8098 states, 6621 states have (on average 1.3177767708805317) internal successors, (8725), 6642 states have internal predecessors, (8725), 823 states have call successors, (823), 654 states have call predecessors, (823), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 07:17:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8098 states to 8098 states and 10425 transitions. [2022-11-19 07:17:56,461 INFO L78 Accepts]: Start accepts. Automaton has 8098 states and 10425 transitions. Word has length 117 [2022-11-19 07:17:56,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:56,461 INFO L495 AbstractCegarLoop]: Abstraction has 8098 states and 10425 transitions. [2022-11-19 07:17:56,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:17:56,461 INFO L276 IsEmpty]: Start isEmpty. Operand 8098 states and 10425 transitions. [2022-11-19 07:17:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-19 07:17:56,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:56,475 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:17:56,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:56,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-19 07:17:56,680 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:56,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1227455605, now seen corresponding path program 1 times [2022-11-19 07:17:56,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:56,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027333477] [2022-11-19 07:17:56,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:56,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:56,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:56,770 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 5 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-11-19 07:17:56,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:56,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027333477] [2022-11-19 07:17:56,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027333477] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:17:56,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509455549] [2022-11-19 07:17:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:56,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:17:56,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:17:56,772 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:17:56,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-19 07:17:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:56,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:17:56,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:17:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-19 07:17:56,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:17:56,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509455549] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:56,945 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:17:56,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:17:56,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868013575] [2022-11-19 07:17:56,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:56,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:17:56,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:17:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:56,946 INFO L87 Difference]: Start difference. First operand 8098 states and 10425 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:17:57,900 INFO L93 Difference]: Finished difference Result 13736 states and 17965 transitions. [2022-11-19 07:17:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:17:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 117 [2022-11-19 07:17:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:17:57,927 INFO L225 Difference]: With dead ends: 13736 [2022-11-19 07:17:57,927 INFO L226 Difference]: Without dead ends: 8084 [2022-11-19 07:17:57,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:17:57,940 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 95 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:17:57,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 288 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:17:57,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8084 states. [2022-11-19 07:17:58,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8084 to 7970. [2022-11-19 07:17:58,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7970 states, 6493 states have (on average 1.289542584321577) internal successors, (8373), 6514 states have internal predecessors, (8373), 823 states have call successors, (823), 654 states have call predecessors, (823), 653 states have return successors, (877), 802 states have call predecessors, (877), 821 states have call successors, (877) [2022-11-19 07:17:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7970 states to 7970 states and 10073 transitions. [2022-11-19 07:17:58,953 INFO L78 Accepts]: Start accepts. Automaton has 7970 states and 10073 transitions. Word has length 117 [2022-11-19 07:17:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:17:58,953 INFO L495 AbstractCegarLoop]: Abstraction has 7970 states and 10073 transitions. [2022-11-19 07:17:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:17:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 7970 states and 10073 transitions. [2022-11-19 07:17:58,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:17:58,968 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:17:58,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:17:58,998 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-19 07:17:59,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:17:59,174 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:17:59,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:17:59,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1205679602, now seen corresponding path program 1 times [2022-11-19 07:17:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:17:59,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448743120] [2022-11-19 07:17:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:17:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:17:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:17:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-11-19 07:17:59,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:17:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448743120] [2022-11-19 07:17:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448743120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:17:59,758 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:17:59,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-19 07:17:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905806421] [2022-11-19 07:17:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:17:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 07:17:59,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:17:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 07:17:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:17:59,760 INFO L87 Difference]: Start difference. First operand 7970 states and 10073 transitions. Second operand has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:18:01,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:01,801 INFO L93 Difference]: Finished difference Result 17707 states and 22861 transitions. [2022-11-19 07:18:01,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 07:18:01,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 114 [2022-11-19 07:18:01,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:01,840 INFO L225 Difference]: With dead ends: 17707 [2022-11-19 07:18:01,840 INFO L226 Difference]: Without dead ends: 13663 [2022-11-19 07:18:01,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-19 07:18:01,853 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 715 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:01,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 374 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 07:18:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13663 states. [2022-11-19 07:18:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13663 to 11149. [2022-11-19 07:18:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11149 states, 9183 states have (on average 1.274420124142437) internal successors, (11703), 9204 states have internal predecessors, (11703), 1075 states have call successors, (1075), 891 states have call predecessors, (1075), 890 states have return successors, (1151), 1054 states have call predecessors, (1151), 1073 states have call successors, (1151) [2022-11-19 07:18:02,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11149 states to 11149 states and 13929 transitions. [2022-11-19 07:18:02,960 INFO L78 Accepts]: Start accepts. Automaton has 11149 states and 13929 transitions. Word has length 114 [2022-11-19 07:18:02,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:02,961 INFO L495 AbstractCegarLoop]: Abstraction has 11149 states and 13929 transitions. [2022-11-19 07:18:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 7 states have (on average 9.857142857142858) internal successors, (69), 8 states have internal predecessors, (69), 6 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 07:18:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 11149 states and 13929 transitions. [2022-11-19 07:18:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-19 07:18:02,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:02,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-19 07:18:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 07:18:02,975 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 2124654225, now seen corresponding path program 1 times [2022-11-19 07:18:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:02,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824361425] [2022-11-19 07:18:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:02,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:02,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:03,034 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-19 07:18:03,035 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:03,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824361425] [2022-11-19 07:18:03,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824361425] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:03,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:03,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:18:03,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76113699] [2022-11-19 07:18:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:03,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:18:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:18:03,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:18:03,037 INFO L87 Difference]: Start difference. First operand 11149 states and 13929 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:18:04,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:04,652 INFO L93 Difference]: Finished difference Result 15639 states and 19757 transitions. [2022-11-19 07:18:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:18:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 114 [2022-11-19 07:18:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:04,677 INFO L225 Difference]: With dead ends: 15639 [2022-11-19 07:18:04,677 INFO L226 Difference]: Without dead ends: 11035 [2022-11-19 07:18:04,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:18:04,687 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 209 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:04,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 310 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:18:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11035 states. [2022-11-19 07:18:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11035 to 11017. [2022-11-19 07:18:05,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11017 states, 9051 states have (on average 1.2641697050049718) internal successors, (11442), 9072 states have internal predecessors, (11442), 1075 states have call successors, (1075), 891 states have call predecessors, (1075), 890 states have return successors, (1151), 1054 states have call predecessors, (1151), 1073 states have call successors, (1151) [2022-11-19 07:18:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11017 states to 11017 states and 13668 transitions. [2022-11-19 07:18:05,681 INFO L78 Accepts]: Start accepts. Automaton has 11017 states and 13668 transitions. Word has length 114 [2022-11-19 07:18:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:05,682 INFO L495 AbstractCegarLoop]: Abstraction has 11017 states and 13668 transitions. [2022-11-19 07:18:05,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:18:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11017 states and 13668 transitions. [2022-11-19 07:18:05,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-19 07:18:05,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:05,696 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:18:05,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 07:18:05,696 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:05,697 INFO L85 PathProgramCache]: Analyzing trace with hash -693482208, now seen corresponding path program 1 times [2022-11-19 07:18:05,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:05,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068541653] [2022-11-19 07:18:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:05,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-11-19 07:18:05,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068541653] [2022-11-19 07:18:05,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068541653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:18:05,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:18:05,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:18:05,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501389749] [2022-11-19 07:18:05,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:18:05,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:18:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:18:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:18:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:18:05,878 INFO L87 Difference]: Start difference. First operand 11017 states and 13668 transitions. Second operand has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:18:07,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:18:07,445 INFO L93 Difference]: Finished difference Result 18699 states and 23158 transitions. [2022-11-19 07:18:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:18:07,446 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 115 [2022-11-19 07:18:07,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:18:07,486 INFO L225 Difference]: With dead ends: 18699 [2022-11-19 07:18:07,486 INFO L226 Difference]: Without dead ends: 14227 [2022-11-19 07:18:07,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:18:07,498 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 104 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:18:07,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 349 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:18:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14227 states. [2022-11-19 07:18:09,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14227 to 13747. [2022-11-19 07:18:09,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13747 states, 11203 states have (on average 1.2510934571097028) internal successors, (14016), 11260 states have internal predecessors, (14016), 1391 states have call successors, (1391), 1144 states have call predecessors, (1391), 1152 states have return successors, (1547), 1343 states have call predecessors, (1547), 1389 states have call successors, (1547) [2022-11-19 07:18:09,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13747 states to 13747 states and 16954 transitions. [2022-11-19 07:18:09,077 INFO L78 Accepts]: Start accepts. Automaton has 13747 states and 16954 transitions. Word has length 115 [2022-11-19 07:18:09,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:18:09,077 INFO L495 AbstractCegarLoop]: Abstraction has 13747 states and 16954 transitions. [2022-11-19 07:18:09,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.0) internal successors, (75), 5 states have internal predecessors, (75), 4 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-19 07:18:09,078 INFO L276 IsEmpty]: Start isEmpty. Operand 13747 states and 16954 transitions. [2022-11-19 07:18:09,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-19 07:18:09,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:18:09,094 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:18:09,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 07:18:09,095 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:18:09,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:18:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1646762640, now seen corresponding path program 1 times [2022-11-19 07:18:09,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:18:09,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62524430] [2022-11-19 07:18:09,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:09,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:18:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:18:09,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:18:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62524430] [2022-11-19 07:18:09,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62524430] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:18:09,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238306079] [2022-11-19 07:18:09,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:18:09,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:18:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:18:09,798 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:18:09,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-19 07:18:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:18:09,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 07:18:09,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:18:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:18:10,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:18:10,533 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:18:10,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238306079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:18:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1161542416] [2022-11-19 07:18:10,553 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2022-11-19 07:18:10,553 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:18:10,557 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:18:10,563 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:18:10,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:18:18,234 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 41 for LOIs [2022-11-19 07:18:18,238 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 124 for LOIs [2022-11-19 07:18:33,261 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 176 for LOIs [2022-11-19 07:18:51,072 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-19 07:18:51,083 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:18:51,094 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 51 for LOIs [2022-11-19 07:18:51,476 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 68 for LOIs [2022-11-19 07:18:51,961 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:19:25,193 WARN L233 SmtUtils]: Spent 31.65s on a formula simplification. DAG size of input: 916 DAG size of output: 820 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:37,005 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 458 DAG size of output: 314 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:19:46,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '371850#(and (<= ~local~0 2147483647) (= ~t1_pc~0 0) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-19 07:19:46,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:19:46,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:19:46,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 20 [2022-11-19 07:19:46,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528654522] [2022-11-19 07:19:46,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:19:46,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 07:19:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 07:19:46,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=4329, Unknown=0, NotChecked=0, Total=4830 [2022-11-19 07:19:46,445 INFO L87 Difference]: Start difference. First operand 13747 states and 16954 transitions. Second operand has 20 states, 16 states have (on average 9.1875) internal successors, (147), 18 states have internal predecessors, (147), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:19:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:49,473 INFO L93 Difference]: Finished difference Result 26754 states and 33681 transitions. [2022-11-19 07:19:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-19 07:19:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 9.1875) internal successors, (147), 18 states have internal predecessors, (147), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 120 [2022-11-19 07:19:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:49,514 INFO L225 Difference]: With dead ends: 26754 [2022-11-19 07:19:49,515 INFO L226 Difference]: Without dead ends: 12973 [2022-11-19 07:19:49,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 323 SyntacticMatches, 7 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5134 ImplicationChecksByTransitivity, 55.3s TimeCoverageRelationStatistics Valid=1014, Invalid=11196, Unknown=0, NotChecked=0, Total=12210 [2022-11-19 07:19:49,543 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 1159 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 1684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:49,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 1809 Invalid, 1684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:19:49,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12973 states. [2022-11-19 07:19:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12973 to 9481. [2022-11-19 07:19:50,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9481 states, 7801 states have (on average 1.2618895013459812) internal successors, (9844), 7825 states have internal predecessors, (9844), 890 states have call successors, (890), 787 states have call predecessors, (890), 789 states have return successors, (946), 868 states have call predecessors, (946), 888 states have call successors, (946) [2022-11-19 07:19:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9481 states to 9481 states and 11680 transitions. [2022-11-19 07:19:50,992 INFO L78 Accepts]: Start accepts. Automaton has 9481 states and 11680 transitions. Word has length 120 [2022-11-19 07:19:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:50,993 INFO L495 AbstractCegarLoop]: Abstraction has 9481 states and 11680 transitions. [2022-11-19 07:19:50,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 9.1875) internal successors, (147), 18 states have internal predecessors, (147), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:19:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 9481 states and 11680 transitions. [2022-11-19 07:19:51,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-19 07:19:51,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:51,001 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 07:19:51,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:51,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:51,207 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:51,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:51,208 INFO L85 PathProgramCache]: Analyzing trace with hash 453970378, now seen corresponding path program 1 times [2022-11-19 07:19:51,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:51,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555539114] [2022-11-19 07:19:51,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:51,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-19 07:19:51,404 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:51,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555539114] [2022-11-19 07:19:51,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555539114] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:51,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013041803] [2022-11-19 07:19:51,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:51,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:51,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:51,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:51,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-19 07:19:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:51,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:19:51,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:19:51,636 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:19:51,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013041803] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:19:51,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:19:51,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:19:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305857120] [2022-11-19 07:19:51,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:19:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:19:51,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:19:51,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:19:51,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:19:51,642 INFO L87 Difference]: Start difference. First operand 9481 states and 11680 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:19:52,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:19:52,913 INFO L93 Difference]: Finished difference Result 17927 states and 22136 transitions. [2022-11-19 07:19:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:19:52,913 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 116 [2022-11-19 07:19:52,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:19:52,942 INFO L225 Difference]: With dead ends: 17927 [2022-11-19 07:19:52,942 INFO L226 Difference]: Without dead ends: 11999 [2022-11-19 07:19:52,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:19:52,956 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 220 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:19:52,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 457 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:19:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11999 states. [2022-11-19 07:19:54,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11999 to 10779. [2022-11-19 07:19:54,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 8806 states have (on average 1.248694072223484) internal successors, (10996), 8843 states have internal predecessors, (10996), 1051 states have call successors, (1051), 911 states have call predecessors, (1051), 921 states have return successors, (1176), 1024 states have call predecessors, (1176), 1049 states have call successors, (1176) [2022-11-19 07:19:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 13223 transitions. [2022-11-19 07:19:54,268 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 13223 transitions. Word has length 116 [2022-11-19 07:19:54,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:19:54,268 INFO L495 AbstractCegarLoop]: Abstraction has 10779 states and 13223 transitions. [2022-11-19 07:19:54,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 5 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:19:54,268 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 13223 transitions. [2022-11-19 07:19:54,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-19 07:19:54,274 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:19:54,274 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:19:54,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-19 07:19:54,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-19 07:19:54,475 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:19:54,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:19:54,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1779794149, now seen corresponding path program 1 times [2022-11-19 07:19:54,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:19:54,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687805390] [2022-11-19 07:19:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:54,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:19:54,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 13 proven. 40 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-19 07:19:55,006 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:19:55,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687805390] [2022-11-19 07:19:55,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687805390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:19:55,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803521534] [2022-11-19 07:19:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:19:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:19:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:19:55,008 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:19:55,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-19 07:19:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:19:55,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 618 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-19 07:19:55,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:19:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 62 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:19:55,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:19:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-19 07:19:55,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803521534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:19:55,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [948533401] [2022-11-19 07:19:55,657 INFO L159 IcfgInterpreter]: Started Sifa with 71 locations of interest [2022-11-19 07:19:55,657 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:19:55,657 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:19:55,658 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:19:55,658 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:19:59,983 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 42 for LOIs [2022-11-19 07:19:59,986 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-11-19 07:20:00,005 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-11-19 07:20:00,027 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-19 07:20:00,046 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 60 for LOIs [2022-11-19 07:20:00,062 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 53 for LOIs [2022-11-19 07:20:00,132 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 58 for LOIs [2022-11-19 07:20:00,272 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:11,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '461724#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= 0 ~t2_pc~0) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:11,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:11,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:11,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 21 [2022-11-19 07:20:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807928070] [2022-11-19 07:20:11,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:11,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-19 07:20:11,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:11,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-19 07:20:11,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=4807, Unknown=0, NotChecked=0, Total=5256 [2022-11-19 07:20:11,917 INFO L87 Difference]: Start difference. First operand 10779 states and 13223 transitions. Second operand has 21 states, 17 states have (on average 9.176470588235293) internal successors, (156), 19 states have internal predecessors, (156), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:20:16,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:16,710 INFO L93 Difference]: Finished difference Result 21887 states and 27373 transitions. [2022-11-19 07:20:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-19 07:20:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 9.176470588235293) internal successors, (156), 19 states have internal predecessors, (156), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 123 [2022-11-19 07:20:16,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:16,740 INFO L225 Difference]: With dead ends: 21887 [2022-11-19 07:20:16,741 INFO L226 Difference]: Without dead ends: 12015 [2022-11-19 07:20:16,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 348 SyntacticMatches, 18 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11341 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1675, Invalid=23447, Unknown=0, NotChecked=0, Total=25122 [2022-11-19 07:20:16,763 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 1394 mSDsluCounter, 2116 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 471 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1400 SdHoareTripleChecker+Valid, 2407 SdHoareTripleChecker+Invalid, 2628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 471 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:16,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1400 Valid, 2407 Invalid, 2628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [471 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-19 07:20:16,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2022-11-19 07:20:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 7635. [2022-11-19 07:20:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7635 states, 6312 states have (on average 1.253960709759189) internal successors, (7915), 6329 states have internal predecessors, (7915), 683 states have call successors, (683), 633 states have call predecessors, (683), 639 states have return successors, (762), 672 states have call predecessors, (762), 681 states have call successors, (762) [2022-11-19 07:20:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 9360 transitions. [2022-11-19 07:20:17,857 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 9360 transitions. Word has length 123 [2022-11-19 07:20:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:17,857 INFO L495 AbstractCegarLoop]: Abstraction has 7635 states and 9360 transitions. [2022-11-19 07:20:17,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 9.176470588235293) internal successors, (156), 19 states have internal predecessors, (156), 9 states have call successors, (34), 5 states have call predecessors, (34), 8 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2022-11-19 07:20:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 9360 transitions. [2022-11-19 07:20:17,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-19 07:20:17,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:17,863 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:20:17,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:18,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-19 07:20:18,064 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:18,064 INFO L85 PathProgramCache]: Analyzing trace with hash 620293973, now seen corresponding path program 1 times [2022-11-19 07:20:18,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292269979] [2022-11-19 07:20:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:18,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:18,300 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 20 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-19 07:20:18,301 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292269979] [2022-11-19 07:20:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292269979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:18,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091872903] [2022-11-19 07:20:18,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:18,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:18,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:18,303 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:18,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-19 07:20:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-19 07:20:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 60 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 07:20:18,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-19 07:20:18,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091872903] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:18,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [643326787] [2022-11-19 07:20:18,964 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2022-11-19 07:20:18,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:18,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:18,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:18,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:23,083 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 43 for LOIs [2022-11-19 07:20:23,085 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 60 for LOIs [2022-11-19 07:20:23,107 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 85 for LOIs [2022-11-19 07:20:23,127 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 85 for LOIs [2022-11-19 07:20:23,136 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 38 for LOIs [2022-11-19 07:20:23,142 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 50 for LOIs [2022-11-19 07:20:23,207 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 60 for LOIs [2022-11-19 07:20:23,387 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:20:35,576 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '503015#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= 0 ~t3_pc~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:20:35,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:20:35,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:20:35,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 17 [2022-11-19 07:20:35,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277897067] [2022-11-19 07:20:35,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:20:35,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-19 07:20:35,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:20:35,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-19 07:20:35,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=4682, Unknown=0, NotChecked=0, Total=5112 [2022-11-19 07:20:35,580 INFO L87 Difference]: Start difference. First operand 7635 states and 9360 transitions. Second operand has 17 states, 14 states have (on average 9.357142857142858) internal successors, (131), 15 states have internal predecessors, (131), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:20:39,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:20:39,448 INFO L93 Difference]: Finished difference Result 14756 states and 18170 transitions. [2022-11-19 07:20:39,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-11-19 07:20:39,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 9.357142857142858) internal successors, (131), 15 states have internal predecessors, (131), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) Word has length 125 [2022-11-19 07:20:39,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:20:39,467 INFO L225 Difference]: With dead ends: 14756 [2022-11-19 07:20:39,467 INFO L226 Difference]: Without dead ends: 8278 [2022-11-19 07:20:39,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 340 SyntacticMatches, 17 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11176 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=1758, Invalid=23048, Unknown=0, NotChecked=0, Total=24806 [2022-11-19 07:20:39,483 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 839 mSDsluCounter, 2388 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 2712 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:20:39,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 2712 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 1527 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-19 07:20:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8278 states. [2022-11-19 07:20:40,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8278 to 5994. [2022-11-19 07:20:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5994 states, 4962 states have (on average 1.2404272470777913) internal successors, (6155), 4977 states have internal predecessors, (6155), 525 states have call successors, (525), 498 states have call predecessors, (525), 506 states have return successors, (595), 518 states have call predecessors, (595), 523 states have call successors, (595) [2022-11-19 07:20:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5994 states to 5994 states and 7275 transitions. [2022-11-19 07:20:40,123 INFO L78 Accepts]: Start accepts. Automaton has 5994 states and 7275 transitions. Word has length 125 [2022-11-19 07:20:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:20:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 5994 states and 7275 transitions. [2022-11-19 07:20:40,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 9.357142857142858) internal successors, (131), 15 states have internal predecessors, (131), 6 states have call successors, (31), 4 states have call predecessors, (31), 7 states have return successors, (30), 5 states have call predecessors, (30), 6 states have call successors, (30) [2022-11-19 07:20:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 5994 states and 7275 transitions. [2022-11-19 07:20:40,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-19 07:20:40,129 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:20:40,129 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:20:40,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-19 07:20:40,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-19 07:20:40,335 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:20:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:20:40,335 INFO L85 PathProgramCache]: Analyzing trace with hash -532012892, now seen corresponding path program 1 times [2022-11-19 07:20:40,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:20:40,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589813503] [2022-11-19 07:20:40,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:40,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:20:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:41,049 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-19 07:20:41,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:20:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589813503] [2022-11-19 07:20:41,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589813503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:20:41,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196418110] [2022-11-19 07:20:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:20:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:20:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:20:41,051 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:20:41,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-19 07:20:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:20:41,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-19 07:20:41,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:20:41,594 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-19 07:20:41,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:20:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-11-19 07:20:42,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196418110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 07:20:42,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1355601300] [2022-11-19 07:20:42,417 INFO L159 IcfgInterpreter]: Started Sifa with 77 locations of interest [2022-11-19 07:20:42,417 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:20:42,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:20:42,418 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:20:42,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:20:50,317 INFO L197 IcfgInterpreter]: Interpreting procedure error with input of size 44 for LOIs [2022-11-19 07:20:50,320 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events with input of size 139 for LOIs [2022-11-19 07:21:21,358 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events with input of size 179 for LOIs [2022-11-19 07:21:26,567 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels with input of size 147 for LOIs [2022-11-19 07:21:26,593 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread with input of size 39 for LOIs [2022-11-19 07:21:26,599 INFO L197 IcfgInterpreter]: Interpreting procedure immediate_notify with input of size 57 for LOIs [2022-11-19 07:21:26,701 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads with input of size 39 for LOIs [2022-11-19 07:21:27,010 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:21:37,727 WARN L233 SmtUtils]: Spent 9.34s on a formula simplification. DAG size of input: 340 DAG size of output: 288 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:22:00,055 WARN L233 SmtUtils]: Spent 16.46s on a formula simplification. DAG size of input: 935 DAG size of output: 630 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-19 07:22:11,851 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '532089#(and (<= ~t1_pc~0 1) (<= ~local~0 2147483647) (= ~t1_i~0 1) (<= 0 (+ ~local~0 2147483648)) (<= 0 ~t2_pc~0) (= ~m_pc~0 1) (<= ~t2_pc~0 1) (= ~m_i~0 1) (not (= ~token~0 (+ 3 ~local~0))) (<= ~t3_pc~0 1) (= ~t2_i~0 1) (= ~m_st~0 1) (= |#NULL.offset| 0) (<= ~token~0 2147483647) (<= 0 ~t3_pc~0) (= ~t3_i~0 1) (<= 0 (+ ~token~0 2147483648)) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_pc~0) (= |#NULL.base| 0))' at error location [2022-11-19 07:22:11,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:22:11,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 07:22:11,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9, 12] total 36 [2022-11-19 07:22:11,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337733106] [2022-11-19 07:22:11,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 07:22:11,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-19 07:22:11,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:11,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-19 07:22:11,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=8480, Unknown=0, NotChecked=0, Total=9120 [2022-11-19 07:22:11,854 INFO L87 Difference]: Start difference. First operand 5994 states and 7275 transitions. Second operand has 36 states, 24 states have (on average 8.166666666666666) internal successors, (196), 27 states have internal predecessors, (196), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-19 07:22:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:19,181 INFO L93 Difference]: Finished difference Result 13642 states and 16776 transitions. [2022-11-19 07:22:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-19 07:22:19,182 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 24 states have (on average 8.166666666666666) internal successors, (196), 27 states have internal predecessors, (196), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) Word has length 127 [2022-11-19 07:22:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:19,199 INFO L225 Difference]: With dead ends: 13642 [2022-11-19 07:22:19,199 INFO L226 Difference]: Without dead ends: 8539 [2022-11-19 07:22:19,211 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9473 ImplicationChecksByTransitivity, 48.9s TimeCoverageRelationStatistics Valid=2426, Invalid=23014, Unknown=0, NotChecked=0, Total=25440 [2022-11-19 07:22:19,211 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 5128 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 1543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5128 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1543 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:19,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5128 Valid, 828 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1543 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-19 07:22:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8539 states. [2022-11-19 07:22:20,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8539 to 5625. [2022-11-19 07:22:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5625 states, 4660 states have (on average 1.2396995708154506) internal successors, (5777), 4672 states have internal predecessors, (5777), 498 states have call successors, (498), 467 states have call predecessors, (498), 466 states have return successors, (496), 485 states have call predecessors, (496), 496 states have call successors, (496) [2022-11-19 07:22:20,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5625 states to 5625 states and 6771 transitions. [2022-11-19 07:22:20,070 INFO L78 Accepts]: Start accepts. Automaton has 5625 states and 6771 transitions. Word has length 127 [2022-11-19 07:22:20,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:20,070 INFO L495 AbstractCegarLoop]: Abstraction has 5625 states and 6771 transitions. [2022-11-19 07:22:20,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 24 states have (on average 8.166666666666666) internal successors, (196), 27 states have internal predecessors, (196), 14 states have call successors, (41), 11 states have call predecessors, (41), 18 states have return successors, (40), 14 states have call predecessors, (40), 14 states have call successors, (40) [2022-11-19 07:22:20,070 INFO L276 IsEmpty]: Start isEmpty. Operand 5625 states and 6771 transitions. [2022-11-19 07:22:20,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:22:20,073 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:20,073 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:20,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:20,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-19 07:22:20,279 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1963712980, now seen corresponding path program 1 times [2022-11-19 07:22:20,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:20,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345631214] [2022-11-19 07:22:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:20,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 31 proven. 19 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-11-19 07:22:20,451 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345631214] [2022-11-19 07:22:20,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345631214] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:22:20,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105277050] [2022-11-19 07:22:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:20,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:20,453 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:20,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-19 07:22:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:20,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-19 07:22:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-19 07:22:20,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:20,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105277050] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:20,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:22:20,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2022-11-19 07:22:20,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218314095] [2022-11-19 07:22:20,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:20,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:20,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:20,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:22:20,680 INFO L87 Difference]: Start difference. First operand 5625 states and 6771 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:22:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:21,552 INFO L93 Difference]: Finished difference Result 11015 states and 13358 transitions. [2022-11-19 07:22:21,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:21,553 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 141 [2022-11-19 07:22:21,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:21,563 INFO L225 Difference]: With dead ends: 11015 [2022-11-19 07:22:21,563 INFO L226 Difference]: Without dead ends: 5977 [2022-11-19 07:22:21,571 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 07:22:21,573 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 86 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:21,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 157 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 07:22:21,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5977 states. [2022-11-19 07:22:22,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5765. [2022-11-19 07:22:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5765 states, 4792 states have (on average 1.2226627712854758) internal successors, (5859), 4804 states have internal predecessors, (5859), 498 states have call successors, (498), 475 states have call predecessors, (498), 474 states have return successors, (510), 485 states have call predecessors, (510), 496 states have call successors, (510) [2022-11-19 07:22:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5765 states to 5765 states and 6867 transitions. [2022-11-19 07:22:22,417 INFO L78 Accepts]: Start accepts. Automaton has 5765 states and 6867 transitions. Word has length 141 [2022-11-19 07:22:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:22,417 INFO L495 AbstractCegarLoop]: Abstraction has 5765 states and 6867 transitions. [2022-11-19 07:22:22,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-19 07:22:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 5765 states and 6867 transitions. [2022-11-19 07:22:22,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-19 07:22:22,421 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:22,421 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:22,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:22,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-19 07:22:22,628 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:22,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:22,628 INFO L85 PathProgramCache]: Analyzing trace with hash -100460177, now seen corresponding path program 1 times [2022-11-19 07:22:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857385399] [2022-11-19 07:22:22,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:22,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 35 proven. 17 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-11-19 07:22:22,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:22,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857385399] [2022-11-19 07:22:22,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857385399] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:22:22,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333164685] [2022-11-19 07:22:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:22,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:22,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:22,706 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:22,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-19 07:22:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:22,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 07:22:22,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-19 07:22:22,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:22,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333164685] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:22,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:22:22,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-11-19 07:22:22,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628531973] [2022-11-19 07:22:22,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:22,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:22:22,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:22:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:22,949 INFO L87 Difference]: Start difference. First operand 5765 states and 6867 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:22:23,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:23,753 INFO L93 Difference]: Finished difference Result 10609 states and 12838 transitions. [2022-11-19 07:22:23,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:22:23,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 141 [2022-11-19 07:22:23,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:23,764 INFO L225 Difference]: With dead ends: 10609 [2022-11-19 07:22:23,765 INFO L226 Difference]: Without dead ends: 5428 [2022-11-19 07:22:23,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:22:23,773 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 94 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:23,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 224 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 07:22:23,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5428 states. [2022-11-19 07:22:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5428 to 5330. [2022-11-19 07:22:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5330 states, 4411 states have (on average 1.175470414871911) internal successors, (5185), 4423 states have internal predecessors, (5185), 471 states have call successors, (471), 448 states have call predecessors, (471), 447 states have return successors, (483), 458 states have call predecessors, (483), 469 states have call successors, (483) [2022-11-19 07:22:24,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5330 states to 5330 states and 6139 transitions. [2022-11-19 07:22:24,574 INFO L78 Accepts]: Start accepts. Automaton has 5330 states and 6139 transitions. Word has length 141 [2022-11-19 07:22:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:24,574 INFO L495 AbstractCegarLoop]: Abstraction has 5330 states and 6139 transitions. [2022-11-19 07:22:24,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-11-19 07:22:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5330 states and 6139 transitions. [2022-11-19 07:22:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-19 07:22:24,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:24,578 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:24,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:24,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-19 07:22:24,784 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:24,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1267629176, now seen corresponding path program 1 times [2022-11-19 07:22:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:24,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556216371] [2022-11-19 07:22:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:24,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 43 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-19 07:22:24,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556216371] [2022-11-19 07:22:24,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556216371] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:22:24,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058546541] [2022-11-19 07:22:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:24,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:22:24,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:22:24,996 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:22:25,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-19 07:22:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-19 07:22:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:22:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-19 07:22:25,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 07:22:25,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058546541] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:25,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 07:22:25,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 6 [2022-11-19 07:22:25,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408219973] [2022-11-19 07:22:25,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:25,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:22:25,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:25,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:22:25,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:22:25,262 INFO L87 Difference]: Start difference. First operand 5330 states and 6139 transitions. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:22:26,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:26,491 INFO L93 Difference]: Finished difference Result 11056 states and 12787 transitions. [2022-11-19 07:22:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 07:22:26,492 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 144 [2022-11-19 07:22:26,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:26,503 INFO L225 Difference]: With dead ends: 11056 [2022-11-19 07:22:26,503 INFO L226 Difference]: Without dead ends: 6550 [2022-11-19 07:22:26,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-11-19 07:22:26,509 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 236 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:26,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 353 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:22:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2022-11-19 07:22:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 6010. [2022-11-19 07:22:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6010 states, 4915 states have (on average 1.1611393692777212) internal successors, (5707), 4933 states have internal predecessors, (5707), 565 states have call successors, (565), 520 states have call predecessors, (565), 529 states have return successors, (625), 556 states have call predecessors, (625), 563 states have call successors, (625) [2022-11-19 07:22:27,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6010 states to 6010 states and 6897 transitions. [2022-11-19 07:22:27,345 INFO L78 Accepts]: Start accepts. Automaton has 6010 states and 6897 transitions. Word has length 144 [2022-11-19 07:22:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:27,345 INFO L495 AbstractCegarLoop]: Abstraction has 6010 states and 6897 transitions. [2022-11-19 07:22:27,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 states have internal predecessors, (104), 5 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-19 07:22:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 6010 states and 6897 transitions. [2022-11-19 07:22:27,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-11-19 07:22:27,350 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:27,350 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:27,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-19 07:22:27,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-19 07:22:27,551 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash 409639447, now seen corresponding path program 1 times [2022-11-19 07:22:27,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:27,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582379168] [2022-11-19 07:22:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:27,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:22:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-11-19 07:22:27,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:22:27,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582379168] [2022-11-19 07:22:27,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582379168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:22:27,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:22:27,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:22:27,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611190716] [2022-11-19 07:22:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:22:27,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:22:27,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:22:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:22:27,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:22:27,809 INFO L87 Difference]: Start difference. First operand 6010 states and 6897 transitions. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:22:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:22:31,093 INFO L93 Difference]: Finished difference Result 19095 states and 21986 transitions. [2022-11-19 07:22:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:22:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 173 [2022-11-19 07:22:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:22:31,130 INFO L225 Difference]: With dead ends: 19095 [2022-11-19 07:22:31,130 INFO L226 Difference]: Without dead ends: 16499 [2022-11-19 07:22:31,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 07:22:31,140 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 380 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:22:31,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 1161 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:22:31,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16499 states. [2022-11-19 07:22:32,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16499 to 10438. [2022-11-19 07:22:32,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10438 states, 8481 states have (on average 1.1539912746138428) internal successors, (9787), 8510 states have internal predecessors, (9787), 1020 states have call successors, (1020), 920 states have call predecessors, (1020), 936 states have return successors, (1136), 1007 states have call predecessors, (1136), 1018 states have call successors, (1136) [2022-11-19 07:22:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10438 states to 10438 states and 11943 transitions. [2022-11-19 07:22:32,764 INFO L78 Accepts]: Start accepts. Automaton has 10438 states and 11943 transitions. Word has length 173 [2022-11-19 07:22:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:22:32,765 INFO L495 AbstractCegarLoop]: Abstraction has 10438 states and 11943 transitions. [2022-11-19 07:22:32,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 6 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-11-19 07:22:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 10438 states and 11943 transitions. [2022-11-19 07:22:32,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-11-19 07:22:32,773 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:22:32,774 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:22:32,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-19 07:22:32,774 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 07:22:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:22:32,775 INFO L85 PathProgramCache]: Analyzing trace with hash -464660399, now seen corresponding path program 1 times [2022-11-19 07:22:32,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:22:32,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770166220] [2022-11-19 07:22:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:22:32,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:22:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:22:32,809 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 07:22:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 07:22:32,921 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 07:22:32,922 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 07:22:32,923 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 07:22:32,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 07:22:32,928 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:22:32,935 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 07:22:33,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 07:22:33 BoogieIcfgContainer [2022-11-19 07:22:33,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 07:22:33,113 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 07:22:33,113 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 07:22:33,113 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 07:22:33,113 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:17:33" (3/4) ... [2022-11-19 07:22:33,128 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 07:22:33,339 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 07:22:33,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 07:22:33,340 INFO L158 Benchmark]: Toolchain (without parser) took 300899.60ms. Allocated memory was 123.7MB in the beginning and 3.9GB in the end (delta: 3.8GB). Free memory was 90.6MB in the beginning and 2.6GB in the end (delta: -2.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-19 07:22:33,340 INFO L158 Benchmark]: CDTParser took 10.18ms. Allocated memory is still 86.0MB. Free memory was 40.7MB in the beginning and 58.2MB in the end (delta: -17.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,343 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.23ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 97.2MB in the end (delta: -6.6MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,345 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.30ms. Allocated memory is still 123.7MB. Free memory was 97.2MB in the beginning and 95.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,345 INFO L158 Benchmark]: Boogie Preprocessor took 74.36ms. Allocated memory is still 123.7MB. Free memory was 95.1MB in the beginning and 93.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,345 INFO L158 Benchmark]: RCFGBuilder took 947.84ms. Allocated memory is still 123.7MB. Free memory was 93.0MB in the beginning and 43.6MB in the end (delta: 49.4MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,350 INFO L158 Benchmark]: TraceAbstraction took 299239.42ms. Allocated memory was 123.7MB in the beginning and 3.9GB in the end (delta: 3.8GB). Free memory was 43.1MB in the beginning and 2.6GB in the end (delta: -2.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. [2022-11-19 07:22:33,351 INFO L158 Benchmark]: Witness Printer took 227.09ms. Allocated memory is still 3.9GB. Free memory was 2.6GB in the beginning and 2.6GB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-11-19 07:22:33,354 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 10.18ms. Allocated memory is still 86.0MB. Free memory was 40.7MB in the beginning and 58.2MB in the end (delta: -17.5MB). Peak memory consumption was 7.6MB. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 356.23ms. Allocated memory is still 123.7MB. Free memory was 90.6MB in the beginning and 97.2MB in the end (delta: -6.6MB). Peak memory consumption was 11.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.30ms. Allocated memory is still 123.7MB. Free memory was 97.2MB in the beginning and 95.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 74.36ms. Allocated memory is still 123.7MB. Free memory was 95.1MB in the beginning and 93.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 947.84ms. Allocated memory is still 123.7MB. Free memory was 93.0MB in the beginning and 43.6MB in the end (delta: 49.4MB). Peak memory consumption was 48.2MB. Max. memory is 16.1GB. * TraceAbstraction took 299239.42ms. Allocated memory was 123.7MB in the beginning and 3.9GB in the end (delta: 3.8GB). Free memory was 43.1MB in the beginning and 2.6GB in the end (delta: -2.5GB). Peak memory consumption was 1.3GB. Max. memory is 16.1GB. * Witness Printer took 227.09ms. Allocated memory is still 3.9GB. Free memory was 2.6GB in the beginning and 2.6GB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 20]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L28] int m_st ; [L38] int T2_E = 2; [L39] int T3_E = 2; [L37] int T1_E = 2; [L27] int t3_pc = 0; [L26] int t2_pc = 0; [L51] int local ; [L25] int t1_pc = 0; [L49] int token ; [L33] int t1_i ; [L36] int M_E = 2; [L40] int E_M = 2; [L32] int m_i ; [L41] int E_1 = 2; [L24] int m_pc = 0; [L30] int t2_st ; [L43] int E_3 = 2; [L29] int t1_st ; [L42] int E_2 = 2; [L31] int t3_st ; [L35] int t3_i ; [L34] int t2_i ; [L735] int __retres1 ; [L739] CALL init_model() [L648] m_i = 1 [L649] t1_i = 1 [L650] t2_i = 1 [L651] t3_i = 1 [L739] RET init_model() [L740] CALL start_simulation() [L676] int kernel_st ; [L677] int tmp ; [L678] int tmp___0 ; [L682] kernel_st = 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L683] FCALL update_channels() VAL [E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L684] CALL init_threads() [L304] COND TRUE m_i == 1 [L305] m_st = 0 [L309] COND TRUE t1_i == 1 [L310] t1_st = 0 [L314] COND TRUE t2_i == 1 [L315] t2_st = 0 [L319] COND TRUE t3_i == 1 [L320] t3_st = 0 [L684] RET init_threads() [L685] CALL fire_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L441] COND FALSE !(M_E == 0) [L446] COND FALSE !(T1_E == 0) [L451] COND FALSE !(T2_E == 0) [L456] COND FALSE !(T3_E == 0) [L461] COND FALSE !(E_M == 0) [L466] COND FALSE !(E_1 == 0) [L471] COND FALSE !(E_2 == 0) [L476] COND FALSE !(E_3 == 0) [L685] RET fire_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L686] CALL activate_threads() VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L220] COND FALSE !(m_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L230] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L239] COND FALSE !(t1_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L249] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L258] COND FALSE !(t2_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L268] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L277] COND FALSE !(t3_pc == 1) VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L287] __retres1 = 0 VAL [\old(m_st)=0, \old(t1_st)=0, \old(t2_st)=0, \old(t3_st)=0, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L686] RET activate_threads() VAL [E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L687] CALL reset_delta_events() VAL [\old(E_1)=2, \old(E_2)=2, \old(E_3)=2, \old(E_M)=2, \old(M_E)=2, \old(T1_E)=2, \old(T2_E)=2, \old(T3_E)=2, E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L489] COND FALSE !(M_E == 1) [L494] COND FALSE !(T1_E == 1) [L499] COND FALSE !(T2_E == 1) [L504] COND FALSE !(T3_E == 1) [L509] COND FALSE !(E_M == 1) [L514] COND FALSE !(E_1 == 1) [L519] COND FALSE !(E_2 == 1) [L524] COND FALSE !(E_3 == 1) [L687] RET reset_delta_events() VAL [E_1=2, E_2=2, E_3=2, E_M=2, kernel_st=0, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L690] COND TRUE 1 [L693] kernel_st = 1 [L694] CALL eval() [L360] int tmp ; VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, tmp=1, token=0] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, tmp=1, tmp_ndt_1=0, token=0] [L388] COND TRUE t1_st == 0 [L389] int tmp_ndt_2; [L390] tmp_ndt_2 = __VERIFIER_nondet_int() [L391] COND TRUE \read(tmp_ndt_2) [L393] t1_st = 1 [L394] CALL transmit1() [L112] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L123] COND TRUE 1 [L125] t1_pc = 1 [L126] t1_st = 2 [L394] RET transmit1() [L402] COND TRUE t2_st == 0 [L403] int tmp_ndt_3; [L404] tmp_ndt_3 = __VERIFIER_nondet_int() [L405] COND TRUE \read(tmp_ndt_3) [L407] t2_st = 1 [L408] CALL transmit2() [L148] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, T3_E=2, t3_i=1, t3_pc=0, t3_st=0, token=0] [L159] COND TRUE 1 [L161] t2_pc = 1 [L162] t2_st = 2 [L408] RET transmit2() [L416] COND TRUE t3_st == 0 [L417] int tmp_ndt_4; [L418] tmp_ndt_4 = __VERIFIER_nondet_int() [L419] COND TRUE \read(tmp_ndt_4) [L421] t3_st = 1 [L422] CALL transmit3() [L184] COND TRUE t3_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=0, t3_st=1, token=0] [L195] COND TRUE 1 [L197] t3_pc = 1 [L198] t3_st = 2 [L422] RET transmit3() [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=-1, tmp_ndt_4=1, token=0] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=-1, tmp_ndt_4=1, token=0] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=0, tmp_ndt_2=1, tmp_ndt_3=-1, tmp_ndt_4=1, token=0] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND TRUE \read(tmp_ndt_1) [L379] m_st = 1 [L380] CALL master() [L54] int tmp_var = __VERIFIER_nondet_int(); [L56] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L67] COND TRUE 1 [L70] token = __VERIFIER_nondet_int() [L71] local = token [L72] E_1 = 1 VAL [E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L73] CALL immediate_notify() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L581] CALL activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L220] COND FALSE !(m_pc == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L230] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L239] COND TRUE t1_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L240] COND TRUE E_1 == 1 [L241] __retres1 = 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND TRUE \read(tmp___0) [L552] t1_st = 0 [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L258] COND TRUE t2_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L259] COND FALSE !(E_2 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L268] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L277] COND TRUE t3_pc == 1 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L278] COND FALSE !(E_3 == 1) VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L287] __retres1 = 0 VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [\old(m_st)=1, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=2, E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L73] RET immediate_notify() VAL [E_1=1, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L74] E_1 = 2 [L75] m_pc = 1 [L76] m_st = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=0, token=0] [L380] RET master() [L388] COND TRUE t1_st == 0 [L389] int tmp_ndt_2; [L390] tmp_ndt_2 = __VERIFIER_nondet_int() [L391] COND TRUE \read(tmp_ndt_2) [L393] t1_st = 1 [L394] CALL transmit1() [L112] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=0] [L115] COND TRUE t1_pc == 1 [L131] token += 1 [L132] E_2 = 1 VAL [E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L133] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L581] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L220] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L221] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L230] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L239] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L240] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L249] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L258] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L259] COND TRUE E_2 == 1 [L260] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=1, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND TRUE \read(tmp___1) [L560] t2_st = 0 [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L277] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L278] COND FALSE !(E_3 == 1) VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L287] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, __retres1=0, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=1, \old(t2_st)=2, \old(t3_st)=2, E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L133] RET immediate_notify() VAL [E_1=2, E_2=1, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L134] E_2 = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L123] COND TRUE 1 [L125] t1_pc = 1 [L126] t1_st = 2 [L394] RET transmit1() [L402] COND TRUE t2_st == 0 [L403] int tmp_ndt_3; [L404] tmp_ndt_3 = __VERIFIER_nondet_int() [L405] COND TRUE \read(tmp_ndt_3) [L407] t2_st = 1 [L408] CALL transmit2() [L148] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=1] [L151] COND TRUE t2_pc == 1 [L167] token += 1 [L168] E_3 = 1 VAL [E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L169] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L581] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L220] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L221] COND FALSE !(E_M == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L230] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND FALSE !(\read(tmp)) [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L239] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L240] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L249] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L258] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L259] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L268] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=0, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L277] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L278] COND TRUE E_3 == 1 [L279] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, __retres1=1, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=2] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND TRUE \read(tmp___2) [L568] t3_st = 0 [L581] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=1, \old(t3_st)=2, E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L169] RET immediate_notify() VAL [E_1=2, E_2=2, E_3=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L170] E_3 = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, T3_E=2, t3_i=1, t3_pc=1, t3_st=0, token=2] [L159] COND TRUE 1 [L161] t2_pc = 1 [L162] t2_st = 2 [L408] RET transmit2() [L416] COND TRUE t3_st == 0 [L417] int tmp_ndt_4; [L418] tmp_ndt_4 = __VERIFIER_nondet_int() [L419] COND TRUE \read(tmp_ndt_4) [L421] t3_st = 1 [L422] CALL transmit3() [L184] COND FALSE !(t3_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=2] [L187] COND TRUE t3_pc == 1 [L203] token += 1 [L204] E_M = 1 VAL [E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L205] CALL immediate_notify() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L581] CALL activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L534] int tmp ; [L535] int tmp___0 ; [L536] int tmp___1 ; [L537] int tmp___2 ; [L541] CALL, EXPR is_master_triggered() [L217] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L220] COND TRUE m_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L221] COND TRUE E_M == 1 [L222] __retres1 = 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L232] return (__retres1); [L541] RET, EXPR is_master_triggered() [L541] tmp = is_master_triggered() [L543] COND TRUE \read(tmp) [L544] m_st = 0 [L549] CALL, EXPR is_transmit1_triggered() [L236] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L239] COND TRUE t1_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L240] COND FALSE !(E_1 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L249] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L251] return (__retres1); [L549] RET, EXPR is_transmit1_triggered() [L549] tmp___0 = is_transmit1_triggered() [L551] COND FALSE !(\read(tmp___0)) [L557] CALL, EXPR is_transmit2_triggered() [L255] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L258] COND TRUE t2_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L259] COND FALSE !(E_2 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L268] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L270] return (__retres1); [L557] RET, EXPR is_transmit2_triggered() [L557] tmp___1 = is_transmit2_triggered() [L559] COND FALSE !(\read(tmp___1)) [L565] CALL, EXPR is_transmit3_triggered() [L274] int __retres1 ; VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L277] COND TRUE t3_pc == 1 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L278] COND FALSE !(E_3 == 1) VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L287] __retres1 = 0 VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, __retres1=0, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L289] return (__retres1); [L565] RET, EXPR is_transmit3_triggered() [L565] tmp___2 = is_transmit3_triggered() [L567] COND FALSE !(\read(tmp___2)) [L581] RET activate_threads() VAL [\old(m_st)=2, \old(t1_st)=2, \old(t2_st)=2, \old(t3_st)=1, E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L205] RET immediate_notify() VAL [E_1=2, E_2=2, E_3=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L206] E_M = 2 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=1, token=3] [L195] COND TRUE 1 [L197] t3_pc = 1 [L198] t3_st = 2 [L422] RET transmit3() [L364] COND TRUE 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=-2, tmp_ndt_4=1, token=3] [L367] CALL, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L329] int __retres1 ; [L332] COND TRUE m_st == 0 [L333] __retres1 = 1 [L355] return (__retres1); [L367] RET, EXPR exists_runnable_thread() VAL [E_1=2, E_2=2, E_3=2, E_M=2, exists_runnable_thread()=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=-2, tmp_ndt_4=1, token=3] [L367] tmp = exists_runnable_thread() [L369] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp=1, tmp_ndt_1=1, tmp_ndt_2=1, tmp_ndt_3=-2, tmp_ndt_4=1, token=3] [L374] COND TRUE m_st == 0 [L375] int tmp_ndt_1; [L376] tmp_ndt_1 = __VERIFIER_nondet_int() [L377] COND TRUE \read(tmp_ndt_1) [L379] m_st = 1 [L380] CALL master() [L54] int tmp_var = __VERIFIER_nondet_int(); [L56] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L59] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L81] COND FALSE !(token != local + 3) [L86] COND TRUE tmp_var <= 5 [L87] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L92] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L93] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L94] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, tmp_var=5, token=3] [L95] CALL error() VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] [L20] reach_error() VAL [E_1=2, E_2=2, E_3=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, T3_E=2, t3_i=1, t3_pc=1, t3_st=2, token=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 95 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 299.0s, OverallIterations: 31, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.3s, AutomataDifference: 40.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13063 SdHoareTripleChecker+Valid, 9.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12964 mSDsluCounter, 15929 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 10939 mSDsCounter, 3467 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10901 IncrementalHoareTripleChecker+Invalid, 14368 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3467 mSolverCounterUnsat, 4990 mSDtfsCounter, 10901 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4301 GetRequests, 3543 SyntacticMatches, 44 SemanticMatches, 714 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37191 ImplicationChecksByTransitivity, 132.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13747occurred in iteration=21, InterpolantAutomatonStates: 430, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 19.4s AutomataMinimizationTime, 30 MinimizatonAttempts, 27449 StatesRemovedByMinimization, 29 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.8s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 11.1s InterpolantComputationTime, 6139 NumberOfCodeBlocks, 6139 NumberOfCodeBlocksAsserted, 54 NumberOfCheckSat, 6401 ConstructedInterpolants, 0 QuantifiedInterpolants, 11918 SizeOfPredicates, 38 NumberOfNonLiveVariables, 12680 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 57 InterpolantComputations, 26 PerfectInterpolantSequences, 3755/4287 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 07:22:33,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f9d1b83e-807d-4959-b5b5-ac9fb6897aa2/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE