./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta --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 e7a194b3d6e079d2329a0d70eaa59b34ff3d58300de8b046ef1cd7cff7f67b94 --- 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-dbf71c6-m [2022-10-17 17:38:44,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:38:44,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:38:44,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:38:44,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:38:44,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:38:44,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:38:44,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:38:44,902 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:38:44,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:38:44,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:38:44,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:38:44,911 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:38:44,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:38:44,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:38:44,918 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:38:44,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:38:44,924 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:38:44,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:38:44,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:38:44,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:38:44,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:38:44,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:38:44,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:38:44,950 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:38:44,951 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:38:44,951 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:38:44,953 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:38:44,954 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:38:44,955 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:38:44,955 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:38:44,957 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:38:44,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:38:44,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:38:44,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:38:44,963 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:38:44,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:38:44,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:38:44,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:38:44,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:38:44,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:38:44,967 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:38:44,990 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:38:44,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:38:44,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:38:44,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:38:44,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:38:44,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:38:44,992 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:38:44,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:38:44,993 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:38:44,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:38:44,993 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:38:44,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:38:44,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:38:44,994 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:38:44,994 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:38:44,995 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:38:44,995 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:38:45,009 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:38:45,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:38:45,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:38:45,011 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:38:45,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:38:45,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:38:45,012 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:38:45,012 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:38:45,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:38:45,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:38:45,013 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:38:45,013 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:38:45,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:38:45,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:38:45,014 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:38:45,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:45,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:38:45,014 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:38:45,015 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:38:45,015 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:38:45,015 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:38:45,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:38:45,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:38:45,016 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:38:45,016 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_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7a194b3d6e079d2329a0d70eaa59b34ff3d58300de8b046ef1cd7cff7f67b94 [2022-10-17 17:38:45,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:38:45,329 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:38:45,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:38:45,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:38:45,336 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:38:45,338 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c [2022-10-17 17:38:45,414 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/data/ba41ccda3/961a547c28bd4e3fa37b304e0f5d0bfe/FLAG10c06c479 [2022-10-17 17:38:45,991 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:38:45,992 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c [2022-10-17 17:38:46,012 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/data/ba41ccda3/961a547c28bd4e3fa37b304e0f5d0bfe/FLAG10c06c479 [2022-10-17 17:38:46,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/data/ba41ccda3/961a547c28bd4e3fa37b304e0f5d0bfe [2022-10-17 17:38:46,289 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:38:46,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:38:46,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:46,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:38:46,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:38:46,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:46,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38ddf301 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46, skipping insertion in model container [2022-10-17 17:38:46,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:46,319 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:38:46,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:38:46,727 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c[17915,17928] [2022-10-17 17:38:46,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:46,761 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:38:46,876 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/sv-benchmarks/c/product-lines/minepump_spec5_product53.cil.c[17915,17928] [2022-10-17 17:38:46,892 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:38:46,916 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:38:46,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46 WrapperNode [2022-10-17 17:38:46,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:38:46,919 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:46,919 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:38:46,919 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:38:46,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:46,954 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,009 INFO L138 Inliner]: procedures = 58, calls = 161, calls flagged for inlining = 25, calls inlined = 22, statements flattened = 286 [2022-10-17 17:38:47,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:38:47,010 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:38:47,010 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:38:47,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:38:47,020 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,034 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,058 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,059 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:38:47,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:38:47,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:38:47,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:38:47,070 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (1/1) ... [2022-10-17 17:38:47,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:38:47,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:47,099 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:38:47,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:38:47,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:38:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-10-17 17:38:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-10-17 17:38:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-10-17 17:38:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-10-17 17:38:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-10-17 17:38:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-10-17 17:38:47,142 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:38:47,142 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__highWaterSensor [2022-10-17 17:38:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-10-17 17:38:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-10-17 17:38:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__lowWaterSensor [2022-10-17 17:38:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__lowWaterSensor [2022-10-17 17:38:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure isPumpRunning [2022-10-17 17:38:47,143 INFO L138 BoogieDeclarations]: Found implementation of procedure isPumpRunning [2022-10-17 17:38:47,143 INFO L130 BoogieDeclarations]: Found specification of procedure deactivatePump [2022-10-17 17:38:47,144 INFO L138 BoogieDeclarations]: Found implementation of procedure deactivatePump [2022-10-17 17:38:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:38:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-10-17 17:38:47,144 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-10-17 17:38:47,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:38:47,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:38:47,265 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:38:47,267 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:38:47,788 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:38:47,964 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:38:47,964 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 17:38:47,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:47 BoogieIcfgContainer [2022-10-17 17:38:47,967 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:38:47,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:38:47,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:38:47,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:38:47,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:38:46" (1/3) ... [2022-10-17 17:38:47,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff5ded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:47, skipping insertion in model container [2022-10-17 17:38:47,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:38:46" (2/3) ... [2022-10-17 17:38:47,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ff5ded3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:38:47, skipping insertion in model container [2022-10-17 17:38:47,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:38:47" (3/3) ... [2022-10-17 17:38:47,978 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec5_product53.cil.c [2022-10-17 17:38:47,998 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:38:47,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:38:48,077 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:38:48,093 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;@53758b35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:38:48,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:38:48,098 INFO L276 IsEmpty]: Start isEmpty. Operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) [2022-10-17 17:38:48,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-10-17 17:38:48,113 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:48,114 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:48,116 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:48,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:48,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1080362011, now seen corresponding path program 1 times [2022-10-17 17:38:48,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:48,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873914602] [2022-10-17 17:38:48,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:48,446 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:48,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873914602] [2022-10-17 17:38:48,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873914602] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:48,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:48,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:38:48,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327885462] [2022-10-17 17:38:48,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:48,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-10-17 17:38:48,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-10-17 17:38:48,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:48,495 INFO L87 Difference]: Start difference. First operand has 69 states, 42 states have (on average 1.4285714285714286) internal successors, (60), 52 states have internal predecessors, (60), 16 states have call successors, (16), 9 states have call predecessors, (16), 9 states have return successors, (16), 11 states have call predecessors, (16), 16 states have call successors, (16) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:38:48,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:48,606 INFO L93 Difference]: Finished difference Result 136 states and 185 transitions. [2022-10-17 17:38:48,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-10-17 17:38:48,609 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-10-17 17:38:48,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:48,617 INFO L225 Difference]: With dead ends: 136 [2022-10-17 17:38:48,618 INFO L226 Difference]: Without dead ends: 64 [2022-10-17 17:38:48,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-10-17 17:38:48,625 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:48,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-17 17:38:48,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-10-17 17:38:48,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 48 states have internal predecessors, (52), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:38:48,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 83 transitions. [2022-10-17 17:38:48,672 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 83 transitions. Word has length 21 [2022-10-17 17:38:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:48,673 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 83 transitions. [2022-10-17 17:38:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 17:38:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 83 transitions. [2022-10-17 17:38:48,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 17:38:48,676 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:48,677 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:48,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:38:48,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:48,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:48,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1884563309, now seen corresponding path program 1 times [2022-10-17 17:38:48,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:48,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351354458] [2022-10-17 17:38:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:48,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:48,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:48,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351354458] [2022-10-17 17:38:48,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351354458] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:48,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:48,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290482758] [2022-10-17 17:38:48,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:48,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:48,840 INFO L87 Difference]: Start difference. First operand 64 states and 83 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:48,931 INFO L93 Difference]: Finished difference Result 126 states and 167 transitions. [2022-10-17 17:38:48,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:48,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-10-17 17:38:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:48,934 INFO L225 Difference]: With dead ends: 126 [2022-10-17 17:38:48,934 INFO L226 Difference]: Without dead ends: 64 [2022-10-17 17:38:48,936 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 [2022-10-17 17:38:48,942 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 70 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:48,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 65 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-10-17 17:38:48,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-10-17 17:38:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 48 states have internal predecessors, (51), 16 states have call successors, (16), 9 states have call predecessors, (16), 8 states have return successors, (15), 10 states have call predecessors, (15), 15 states have call successors, (15) [2022-10-17 17:38:48,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2022-10-17 17:38:48,967 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 24 [2022-10-17 17:38:48,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:48,968 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2022-10-17 17:38:48,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:38:48,969 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2022-10-17 17:38:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 17:38:48,973 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:48,973 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:48,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 17:38:48,974 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:48,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -250429362, now seen corresponding path program 1 times [2022-10-17 17:38:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:48,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40471647] [2022-10-17 17:38:48,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:49,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:49,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:49,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40471647] [2022-10-17 17:38:49,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40471647] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:49,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:49,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906441777] [2022-10-17 17:38:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:49,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:49,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:49,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:49,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:49,154 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:49,283 INFO L93 Difference]: Finished difference Result 175 states and 238 transitions. [2022-10-17 17:38:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-10-17 17:38:49,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:49,291 INFO L225 Difference]: With dead ends: 175 [2022-10-17 17:38:49,291 INFO L226 Difference]: Without dead ends: 113 [2022-10-17 17:38:49,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:49,298 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 57 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:49,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 150 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:49,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-17 17:38:49,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-10-17 17:38:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 79 states have internal predecessors, (89), 24 states have call successors, (24), 17 states have call predecessors, (24), 15 states have return successors, (32), 20 states have call predecessors, (32), 22 states have call successors, (32) [2022-10-17 17:38:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 145 transitions. [2022-10-17 17:38:49,332 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 145 transitions. Word has length 30 [2022-10-17 17:38:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:49,333 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 145 transitions. [2022-10-17 17:38:49,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 17:38:49,333 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 145 transitions. [2022-10-17 17:38:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 17:38:49,335 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:49,335 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:49,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 17:38:49,336 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:49,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:49,337 INFO L85 PathProgramCache]: Analyzing trace with hash 851485166, now seen corresponding path program 1 times [2022-10-17 17:38:49,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:49,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58751228] [2022-10-17 17:38:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:49,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:49,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:49,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58751228] [2022-10-17 17:38:49,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58751228] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:49,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:49,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 17:38:49,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540701567] [2022-10-17 17:38:49,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:49,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:38:49,459 INFO L87 Difference]: Start difference. First operand 111 states and 145 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:38:49,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:49,522 INFO L93 Difference]: Finished difference Result 178 states and 228 transitions. [2022-10-17 17:38:49,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:49,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-10-17 17:38:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:49,527 INFO L225 Difference]: With dead ends: 178 [2022-10-17 17:38:49,527 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 17:38:49,528 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 [2022-10-17 17:38:49,534 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:49,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:38:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 17:38:49,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-10-17 17:38:49,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 69 states have internal predecessors, (77), 18 states have call successors, (18), 15 states have call predecessors, (18), 15 states have return successors, (24), 16 states have call predecessors, (24), 18 states have call successors, (24) [2022-10-17 17:38:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 119 transitions. [2022-10-17 17:38:49,552 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 119 transitions. Word has length 35 [2022-10-17 17:38:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:49,552 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 119 transitions. [2022-10-17 17:38:49,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 17:38:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 119 transitions. [2022-10-17 17:38:49,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 17:38:49,554 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:49,554 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:49,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 17:38:49,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:49,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:49,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1402126779, now seen corresponding path program 1 times [2022-10-17 17:38:49,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:49,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765592321] [2022-10-17 17:38:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:50,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:50,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765592321] [2022-10-17 17:38:50,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765592321] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:50,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:50,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 17:38:50,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757239090] [2022-10-17 17:38:50,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:50,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 17:38:50,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:50,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 17:38:50,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 17:38:50,051 INFO L87 Difference]: Start difference. First operand 95 states and 119 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 17:38:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:50,263 INFO L93 Difference]: Finished difference Result 277 states and 346 transitions. [2022-10-17 17:38:50,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:38:50,264 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 37 [2022-10-17 17:38:50,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:50,270 INFO L225 Difference]: With dead ends: 277 [2022-10-17 17:38:50,270 INFO L226 Difference]: Without dead ends: 184 [2022-10-17 17:38:50,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:50,276 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 109 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:50,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 233 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-10-17 17:38:50,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 176. [2022-10-17 17:38:50,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 113 states have (on average 1.238938053097345) internal successors, (140), 125 states have internal predecessors, (140), 33 states have call successors, (33), 28 states have call predecessors, (33), 29 states have return successors, (45), 30 states have call predecessors, (45), 33 states have call successors, (45) [2022-10-17 17:38:50,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2022-10-17 17:38:50,335 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 37 [2022-10-17 17:38:50,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:50,335 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2022-10-17 17:38:50,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-10-17 17:38:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2022-10-17 17:38:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:38:50,341 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:50,341 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:50,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 17:38:50,342 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:50,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:50,342 INFO L85 PathProgramCache]: Analyzing trace with hash 775405151, now seen corresponding path program 1 times [2022-10-17 17:38:50,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:50,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543977894] [2022-10-17 17:38:50,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:50,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-10-17 17:38:50,773 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:50,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543977894] [2022-10-17 17:38:50,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543977894] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:50,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:50,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-10-17 17:38:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034979639] [2022-10-17 17:38:50,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:50,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 17:38:50,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:50,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 17:38:50,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:50,775 INFO L87 Difference]: Start difference. First operand 176 states and 218 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:38:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:51,373 INFO L93 Difference]: Finished difference Result 424 states and 540 transitions. [2022-10-17 17:38:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-10-17 17:38:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-10-17 17:38:51,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:51,379 INFO L225 Difference]: With dead ends: 424 [2022-10-17 17:38:51,380 INFO L226 Difference]: Without dead ends: 304 [2022-10-17 17:38:51,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:38:51,385 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 174 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:51,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 305 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:38:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-10-17 17:38:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 261. [2022-10-17 17:38:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 172 states have (on average 1.244186046511628) internal successors, (214), 189 states have internal predecessors, (214), 46 states have call successors, (46), 35 states have call predecessors, (46), 42 states have return successors, (65), 47 states have call predecessors, (65), 46 states have call successors, (65) [2022-10-17 17:38:51,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 325 transitions. [2022-10-17 17:38:51,443 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 325 transitions. Word has length 40 [2022-10-17 17:38:51,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:51,444 INFO L495 AbstractCegarLoop]: Abstraction has 261 states and 325 transitions. [2022-10-17 17:38:51,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 5 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-10-17 17:38:51,444 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 325 transitions. [2022-10-17 17:38:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-10-17 17:38:51,446 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:51,446 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:51,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 17:38:51,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:51,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1685826622, now seen corresponding path program 1 times [2022-10-17 17:38:51,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:51,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893286762] [2022-10-17 17:38:51,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:51,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:38:51,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:51,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893286762] [2022-10-17 17:38:51,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893286762] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:51,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:38:51,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 17:38:51,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605345312] [2022-10-17 17:38:51,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:51,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:38:51,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:51,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:38:51,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 17:38:51,594 INFO L87 Difference]: Start difference. First operand 261 states and 325 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:38:51,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:51,906 INFO L93 Difference]: Finished difference Result 555 states and 698 transitions. [2022-10-17 17:38:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-10-17 17:38:51,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-10-17 17:38:51,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:51,909 INFO L225 Difference]: With dead ends: 555 [2022-10-17 17:38:51,910 INFO L226 Difference]: Without dead ends: 296 [2022-10-17 17:38:51,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-10-17 17:38:51,912 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 68 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:51,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 277 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 17:38:51,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-10-17 17:38:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 268. [2022-10-17 17:38:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 176 states have (on average 1.2102272727272727) internal successors, (213), 193 states have internal predecessors, (213), 47 states have call successors, (47), 35 states have call predecessors, (47), 44 states have return successors, (70), 50 states have call predecessors, (70), 47 states have call successors, (70) [2022-10-17 17:38:51,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 330 transitions. [2022-10-17 17:38:51,957 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 330 transitions. Word has length 40 [2022-10-17 17:38:51,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:51,957 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 330 transitions. [2022-10-17 17:38:51,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-10-17 17:38:51,958 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 330 transitions. [2022-10-17 17:38:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-10-17 17:38:51,960 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:51,960 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:38:51,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 17:38:51,960 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1803947791, now seen corresponding path program 1 times [2022-10-17 17:38:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:51,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881219410] [2022-10-17 17:38:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:51,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-10-17 17:38:52,097 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:52,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881219410] [2022-10-17 17:38:52,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881219410] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:52,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344832838] [2022-10-17 17:38:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:52,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:52,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:52,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:52,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:38:52,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:52,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 17:38:52,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:52,376 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:38:52,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344832838] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:38:52,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:38:52,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-10-17 17:38:52,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535060435] [2022-10-17 17:38:52,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:38:52,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:38:52,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:38:52,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:38:52,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:52,378 INFO L87 Difference]: Start difference. First operand 268 states and 330 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:38:52,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:38:52,482 INFO L93 Difference]: Finished difference Result 405 states and 503 transitions. [2022-10-17 17:38:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:38:52,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 70 [2022-10-17 17:38:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:38:52,485 INFO L225 Difference]: With dead ends: 405 [2022-10-17 17:38:52,485 INFO L226 Difference]: Without dead ends: 258 [2022-10-17 17:38:52,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-10-17 17:38:52,487 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 35 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:38:52,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 119 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:38:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-10-17 17:38:52,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-10-17 17:38:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 169 states have (on average 1.1775147928994083) internal successors, (199), 185 states have internal predecessors, (199), 45 states have call successors, (45), 35 states have call predecessors, (45), 43 states have return successors, (56), 48 states have call predecessors, (56), 45 states have call successors, (56) [2022-10-17 17:38:52,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 300 transitions. [2022-10-17 17:38:52,527 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 300 transitions. Word has length 70 [2022-10-17 17:38:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:38:52,527 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 300 transitions. [2022-10-17 17:38:52,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-10-17 17:38:52,528 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 300 transitions. [2022-10-17 17:38:52,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-10-17 17:38:52,529 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:38:52,529 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-10-17 17:38:52,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:38:52,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:52,744 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:38:52,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:38:52,745 INFO L85 PathProgramCache]: Analyzing trace with hash -925446459, now seen corresponding path program 1 times [2022-10-17 17:38:52,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:38:52,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851917690] [2022-10-17 17:38:52,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:52,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:38:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:38:52,975 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:38:52,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851917690] [2022-10-17 17:38:52,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851917690] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:38:52,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363789860] [2022-10-17 17:38:52,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:38:52,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:38:52,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:38:52,977 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:38:52,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:38:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:38:53,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2022-10-17 17:38:53,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:38:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:38:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:38:53,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 17:38:53,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363789860] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:38:53,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1149699659] [2022-10-17 17:38:53,527 INFO L159 IcfgInterpreter]: Started Sifa with 48 locations of interest [2022-10-17 17:38:53,527 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:38:53,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:38:53,536 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:38:53,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:00,435 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 50 for LOIs [2022-10-17 17:39:00,446 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 29 for LOIs [2022-10-17 17:39:00,797 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 65 for LOIs [2022-10-17 17:39:01,442 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 57 for LOIs [2022-10-17 17:39:01,534 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 53 for LOIs [2022-10-17 17:39:01,554 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__base with input of size 39 for LOIs [2022-10-17 17:39:01,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:39:07,584 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6317#(and (= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| |timeShift_getWaterLevel_#res#1|) (= |timeShift_getWaterLevel_~retValue_acc~11#1| ~waterLevel~0) (= ~methaneLevelCritical~0 0) (<= 0 (+ 2147483648 |old(~pumpRunning~0)|)) (= ~head~0.offset 0) (<= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483647) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 0)) (<= |old(~pumpRunning~0)| 2147483647) (= |timeShift_getWaterLevel_~retValue_acc~11#1| |timeShift_getWaterLevel_#res#1|) (= 1 ~systemActive~0) (<= 0 (+ |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1| 2147483648)) (not (= |timeShift___utac_acc__Specification5_spec__3_~tmp~9#1| 2)) (<= 0 (+ 2147483648 |timeShift_getWaterLevel_#res#1|)) (<= |timeShift_getWaterLevel_#res#1| 2147483647) (= ~head~0.base 0) (= |#NULL.offset| 0) (= ~switchedOnBeforeTS~0 0) (<= 0 |#StackHeapBarrier|) (= ~pumpRunning~0 |timeShift___utac_acc__Specification5_spec__3_~tmp___0~3#1|) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-10-17 17:39:07,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:39:07,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:39:07,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 15 [2022-10-17 17:39:07,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037233376] [2022-10-17 17:39:07,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:39:07,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-10-17 17:39:07,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:39:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-10-17 17:39:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1963, Unknown=0, NotChecked=0, Total=2256 [2022-10-17 17:39:07,588 INFO L87 Difference]: Start difference. First operand 258 states and 300 transitions. Second operand has 15 states, 12 states have (on average 7.916666666666667) internal successors, (95), 13 states have internal predecessors, (95), 7 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-10-17 17:39:08,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:39:08,334 INFO L93 Difference]: Finished difference Result 338 states and 403 transitions. [2022-10-17 17:39:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-10-17 17:39:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 7.916666666666667) internal successors, (95), 13 states have internal predecessors, (95), 7 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) Word has length 74 [2022-10-17 17:39:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:39:08,338 INFO L225 Difference]: With dead ends: 338 [2022-10-17 17:39:08,338 INFO L226 Difference]: Without dead ends: 336 [2022-10-17 17:39:08,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 175 SyntacticMatches, 15 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2022-10-17 17:39:08,341 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 173 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-10-17 17:39:08,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 663 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-10-17 17:39:08,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-10-17 17:39:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 294. [2022-10-17 17:39:08,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 190 states have (on average 1.168421052631579) internal successors, (222), 211 states have internal predecessors, (222), 53 states have call successors, (53), 43 states have call predecessors, (53), 50 states have return successors, (68), 54 states have call predecessors, (68), 53 states have call successors, (68) [2022-10-17 17:39:08,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 343 transitions. [2022-10-17 17:39:08,376 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 343 transitions. Word has length 74 [2022-10-17 17:39:08,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:39:08,377 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 343 transitions. [2022-10-17 17:39:08,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 7.916666666666667) internal successors, (95), 13 states have internal predecessors, (95), 7 states have call successors, (23), 4 states have call predecessors, (23), 8 states have return successors, (22), 10 states have call predecessors, (22), 7 states have call successors, (22) [2022-10-17 17:39:08,378 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 343 transitions. [2022-10-17 17:39:08,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-10-17 17:39:08,379 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:39:08,380 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:39:08,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:39:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:08,599 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:39:08,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:39:08,600 INFO L85 PathProgramCache]: Analyzing trace with hash 979712234, now seen corresponding path program 1 times [2022-10-17 17:39:08,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:39:08,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305692561] [2022-10-17 17:39:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:39:08,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 33 proven. 3 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-10-17 17:39:08,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:39:08,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305692561] [2022-10-17 17:39:08,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305692561] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:39:08,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303439721] [2022-10-17 17:39:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:39:08,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:39:08,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:39:08,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:39:08,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_077b236a-6f8e-4a75-9d15-66f2ff52c260/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:39:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:39:09,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 18 conjunts are in the unsatisfiable core [2022-10-17 17:39:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:39:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 17:39:09,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:39:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 45 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-10-17 17:39:09,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303439721] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:39:09,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893303957] [2022-10-17 17:39:09,665 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-10-17 17:39:09,666 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:39:09,667 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:39:09,667 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:39:09,667 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:39:15,533 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 53 for LOIs [2022-10-17 17:39:15,543 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 49 for LOIs [2022-10-17 17:39:16,102 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__lowWaterSensor with input of size 29 for LOIs [2022-10-17 17:39:16,149 INFO L197 IcfgInterpreter]: Interpreting procedure processEnvironment__wrappee__highWaterSensor with input of size 26 for LOIs [2022-10-17 17:39:16,173 INFO L197 IcfgInterpreter]: Interpreting procedure isPumpRunning with input of size 42 for LOIs [2022-10-17 17:39:16,180 INFO L180 IcfgInterpreter]: Interpretation finished