./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 01b43f7e7ecd5c44c6b49183e9415dee9518d36285d69624307f5a03549da1bb --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-19 08:24:58,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:24:58,063 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:24:58,091 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:24:58,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:24:58,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:24:58,101 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:24:58,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:24:58,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:24:58,111 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:24:58,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:24:58,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:24:58,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:24:58,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:24:58,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:24:58,128 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:24:58,129 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:24:58,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:24:58,132 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:24:58,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:24:58,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:24:58,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:24:58,151 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:24:58,152 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:24:58,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:24:58,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:24:58,157 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:24:58,158 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:24:58,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:24:58,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:24:58,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:24:58,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:24:58,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:24:58,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:24:58,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:24:58,164 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:24:58,165 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:24:58,165 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:24:58,165 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:24:58,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:24:58,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:24:58,169 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 08:24:58,202 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:24:58,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:24:58,203 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:24:58,203 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:24:58,204 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:24:58,204 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:24:58,204 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:24:58,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:24:58,205 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:24:58,205 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:24:58,205 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:24:58,205 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:24:58,205 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:24:58,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:24:58,206 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:24:58,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:24:58,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:24:58,206 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:24:58,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:24:58,207 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:24:58,208 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:24:58,208 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:24:58,208 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:24:58,208 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 08:24:58,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:24:58,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 08:24:58,209 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:24:58,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 08:24:58,209 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:24:58,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 08:24:58,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:24:58,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:24:58,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:24:58,210 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:24:58,211 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 08:24:58,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:24:58,212 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_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 01b43f7e7ecd5c44c6b49183e9415dee9518d36285d69624307f5a03549da1bb [2022-11-19 08:24:58,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:24:58,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:24:58,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:24:58,586 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:24:58,587 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:24:58,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c [2022-11-19 08:24:58,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/data/d37eadfef/ee93e3bb09184037b2b5a42c6665016c/FLAG3fb0fc0a0 [2022-11-19 08:24:59,306 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:24:59,307 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c [2022-11-19 08:24:59,325 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/data/d37eadfef/ee93e3bb09184037b2b5a42c6665016c/FLAG3fb0fc0a0 [2022-11-19 08:24:59,533 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/data/d37eadfef/ee93e3bb09184037b2b5a42c6665016c [2022-11-19 08:24:59,535 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:24:59,538 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:24:59,540 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:24:59,540 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:24:59,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:24:59,545 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:24:59" (1/1) ... [2022-11-19 08:24:59,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8e08a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:24:59, skipping insertion in model container [2022-11-19 08:24:59,547 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:24:59" (1/1) ... [2022-11-19 08:24:59,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:24:59,618 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:24:59,879 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c[6381,6394] [2022-11-19 08:24:59,996 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:00,015 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:25:00,058 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/sv-benchmarks/c/product-lines/minepump_spec1_product43.cil.c[6381,6394] [2022-11-19 08:25:00,107 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:25:00,124 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:25:00,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00 WrapperNode [2022-11-19 08:25:00,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:25:00,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:00,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:25:00,126 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:25:00,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,171 INFO L138 Inliner]: procedures = 54, calls = 97, calls flagged for inlining = 23, calls inlined = 20, statements flattened = 185 [2022-11-19 08:25:00,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:25:00,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:25:00,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:25:00,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:25:00,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,186 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,198 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,202 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:25:00,203 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:25:00,203 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:25:00,203 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:25:00,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (1/1) ... [2022-11-19 08:25:00,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:25:00,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:00,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:25:00,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:25:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:25:00,280 INFO L130 BoogieDeclarations]: Found specification of procedure processEnvironment__wrappee__base [2022-11-19 08:25:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure processEnvironment__wrappee__base [2022-11-19 08:25:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure cleanup [2022-11-19 08:25:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure cleanup [2022-11-19 08:25:00,281 INFO L130 BoogieDeclarations]: Found specification of procedure timeShift [2022-11-19 08:25:00,281 INFO L138 BoogieDeclarations]: Found implementation of procedure timeShift [2022-11-19 08:25:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure isMethaneLevelCritical [2022-11-19 08:25:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure isMethaneLevelCritical [2022-11-19 08:25:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure waterRise [2022-11-19 08:25:00,282 INFO L138 BoogieDeclarations]: Found implementation of procedure waterRise [2022-11-19 08:25:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:25:00,282 INFO L130 BoogieDeclarations]: Found specification of procedure changeMethaneLevel [2022-11-19 08:25:00,283 INFO L138 BoogieDeclarations]: Found implementation of procedure changeMethaneLevel [2022-11-19 08:25:00,283 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:25:00,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:25:00,371 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:25:00,374 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:25:00,701 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:25:00,864 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:25:00,865 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-19 08:25:00,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:00 BoogieIcfgContainer [2022-11-19 08:25:00,868 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:25:00,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:25:00,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:25:00,875 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:25:00,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:24:59" (1/3) ... [2022-11-19 08:25:00,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8a128d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:00, skipping insertion in model container [2022-11-19 08:25:00,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:25:00" (2/3) ... [2022-11-19 08:25:00,878 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c8a128d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:25:00, skipping insertion in model container [2022-11-19 08:25:00,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:00" (3/3) ... [2022-11-19 08:25:00,880 INFO L112 eAbstractionObserver]: Analyzing ICFG minepump_spec1_product43.cil.c [2022-11-19 08:25:00,903 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:25:00,904 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 08:25:00,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:25:00,999 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;@7afd9fcc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:25:01,000 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 08:25:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand has 50 states, 32 states have (on average 1.40625) internal successors, (45), 38 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:25:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:25:01,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:01,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:01,019 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1819233039, now seen corresponding path program 1 times [2022-11-19 08:25:01,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:01,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549674801] [2022-11-19 08:25:01,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:01,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:01,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:01,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549674801] [2022-11-19 08:25:01,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549674801] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:01,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:01,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:25:01,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043856785] [2022-11-19 08:25:01,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:01,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:25:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:25:01,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:25:01,420 INFO L87 Difference]: Start difference. First operand has 50 states, 32 states have (on average 1.40625) internal successors, (45), 38 states have internal predecessors, (45), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:01,542 INFO L93 Difference]: Finished difference Result 98 states and 131 transitions. [2022-11-19 08:25:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:25:01,547 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-19 08:25:01,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:01,556 INFO L225 Difference]: With dead ends: 98 [2022-11-19 08:25:01,557 INFO L226 Difference]: Without dead ends: 45 [2022-11-19 08:25:01,560 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 [2022-11-19 08:25:01,564 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:01,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:25:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-19 08:25:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-19 08:25:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 34 states have internal predecessors, (37), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-19 08:25:01,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-11-19 08:25:01,610 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 16 [2022-11-19 08:25:01,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:01,611 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-11-19 08:25:01,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,612 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-11-19 08:25:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:25:01,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:01,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:01,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:25:01,615 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:01,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1139531068, now seen corresponding path program 1 times [2022-11-19 08:25:01,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:01,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780218934] [2022-11-19 08:25:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:01,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:01,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:01,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780218934] [2022-11-19 08:25:01,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780218934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:01,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:01,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:25:01,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716254445] [2022-11-19 08:25:01,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:01,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:25:01,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:01,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:25:01,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:01,724 INFO L87 Difference]: Start difference. First operand 45 states and 56 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:01,773 INFO L93 Difference]: Finished difference Result 67 states and 83 transitions. [2022-11-19 08:25:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:25:01,774 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-19 08:25:01,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:01,775 INFO L225 Difference]: With dead ends: 67 [2022-11-19 08:25:01,775 INFO L226 Difference]: Without dead ends: 37 [2022-11-19 08:25:01,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:25:01,778 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:01,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 57 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 08:25:01,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-19 08:25:01,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-11-19 08:25:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 29 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-19 08:25:01,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-19 08:25:01,789 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-11-19 08:25:01,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:01,790 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-19 08:25:01,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,790 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-19 08:25:01,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-19 08:25:01,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:01,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:01,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:25:01,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:01,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:01,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1054579547, now seen corresponding path program 1 times [2022-11-19 08:25:01,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:01,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441436055] [2022-11-19 08:25:01,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:01,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:01,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:01,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441436055] [2022-11-19 08:25:01,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441436055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:01,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:01,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:25:01,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796632603] [2022-11-19 08:25:01,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:01,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:25:01,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:01,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:25:01,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:25:01,982 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:02,144 INFO L93 Difference]: Finished difference Result 105 states and 131 transitions. [2022-11-19 08:25:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:25:02,145 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-11-19 08:25:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:02,147 INFO L225 Difference]: With dead ends: 105 [2022-11-19 08:25:02,147 INFO L226 Difference]: Without dead ends: 70 [2022-11-19 08:25:02,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:25:02,150 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:02,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 165 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:25:02,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-19 08:25:02,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2022-11-19 08:25:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 51 states have internal predecessors, (55), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-19 08:25:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-19 08:25:02,169 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 19 [2022-11-19 08:25:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:02,170 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-19 08:25:02,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:02,170 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-19 08:25:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:25:02,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:02,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:02,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:25:02,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:02,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:02,177 INFO L85 PathProgramCache]: Analyzing trace with hash 374971382, now seen corresponding path program 1 times [2022-11-19 08:25:02,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:02,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258316827] [2022-11-19 08:25:02,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:02,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:03,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258316827] [2022-11-19 08:25:03,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258316827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:03,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:03,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-19 08:25:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522731318] [2022-11-19 08:25:03,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:03,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:25:03,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:03,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:25:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:25:03,075 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:04,341 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2022-11-19 08:25:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 08:25:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-19 08:25:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:04,345 INFO L225 Difference]: With dead ends: 160 [2022-11-19 08:25:04,345 INFO L226 Difference]: Without dead ends: 158 [2022-11-19 08:25:04,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:25:04,348 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:04,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 153 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:25:04,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-19 08:25:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 128. [2022-11-19 08:25:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 85 states have (on average 1.2705882352941176) internal successors, (108), 96 states have internal predecessors, (108), 23 states have call successors, (23), 19 states have call predecessors, (23), 19 states have return successors, (27), 21 states have call predecessors, (27), 23 states have call successors, (27) [2022-11-19 08:25:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2022-11-19 08:25:04,396 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 22 [2022-11-19 08:25:04,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:04,397 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2022-11-19 08:25:04,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2022-11-19 08:25:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-19 08:25:04,399 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:04,399 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] [2022-11-19 08:25:04,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:25:04,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:04,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1947239933, now seen corresponding path program 1 times [2022-11-19 08:25:04,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:04,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729729428] [2022-11-19 08:25:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:04,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:04,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:25:04,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:04,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729729428] [2022-11-19 08:25:04,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729729428] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:04,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:04,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:25:04,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471320238] [2022-11-19 08:25:04,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:04,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:04,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:04,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:04,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:04,596 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:25:04,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:04,778 INFO L93 Difference]: Finished difference Result 369 states and 458 transitions. [2022-11-19 08:25:04,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:25:04,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 29 [2022-11-19 08:25:04,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:04,793 INFO L225 Difference]: With dead ends: 369 [2022-11-19 08:25:04,793 INFO L226 Difference]: Without dead ends: 254 [2022-11-19 08:25:04,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:25:04,800 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 60 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:04,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 149 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:25:04,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-11-19 08:25:04,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2022-11-19 08:25:04,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 146 states have (on average 1.226027397260274) internal successors, (179), 160 states have internal predecessors, (179), 36 states have call successors, (36), 28 states have call predecessors, (36), 34 states have return successors, (48), 34 states have call predecessors, (48), 36 states have call successors, (48) [2022-11-19 08:25:04,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 263 transitions. [2022-11-19 08:25:04,912 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 263 transitions. Word has length 29 [2022-11-19 08:25:04,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:04,913 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 263 transitions. [2022-11-19 08:25:04,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-19 08:25:04,913 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 263 transitions. [2022-11-19 08:25:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-19 08:25:04,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:04,923 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] [2022-11-19 08:25:04,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:25:04,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:04,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:04,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1593465487, now seen corresponding path program 1 times [2022-11-19 08:25:04,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:04,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278325825] [2022-11-19 08:25:04,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:04,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:04,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:25:05,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:05,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278325825] [2022-11-19 08:25:05,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278325825] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:05,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871681505] [2022-11-19 08:25:05,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:05,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:05,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:05,319 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:05,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:25:05,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:05,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-19 08:25:05,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:05,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:25:06,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871681505] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:06,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [563010759] [2022-11-19 08:25:06,192 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-19 08:25:06,192 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:06,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:06,207 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:06,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:10,941 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 114 for LOIs [2022-11-19 08:25:10,961 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 143 for LOIs [2022-11-19 08:25:12,191 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 27 for LOIs [2022-11-19 08:25:12,194 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 112 for LOIs [2022-11-19 08:25:12,207 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:26,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2357#(and (<= 0 |timeShift_isHighWaterLevel_~tmp~2#1|) (<= |timeShift_processEnvironment_~tmp~0#1| 1) (<= 1 |timeShift_processEnvironment_~tmp~0#1|) (<= 1 |timeShift_isHighWaterLevel_~tmp___0~0#1|) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1| 0)) (<= |timeShift_isHighWaterLevel_#res#1| 1) (<= 1 |timeShift_isHighWaterLevel_~retValue_acc~5#1|) (<= ~methaneLevelCritical~0 1) (<= |timeShift___utac_acc__Specification1_spec__1_~tmp~4#1| 1) (<= |timeShift_isMethaneAlarm_~retValue_acc~3#1| 1) (<= 0 |old(~pumpRunning~0)|) (<= ~pumpRunning~0 1) (<= 0 |timeShift_isMethaneAlarm_~retValue_acc~3#1|) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~4#1|) (= ~head~0.offset 0) (<= 1 ~systemActive~0) (= |timeShift_activatePump_~tmp~1#1| 0) (<= 2 ~waterLevel~0) (<= |timeShift_isHighWaterLevel_~tmp~2#1| 0) (<= |timeShift_isHighWaterSensorDry_~retValue_acc~2#1| 0) (<= 0 |timeShift_isHighWaterSensorDry_#res#1|) (<= |#NULL.offset| 0) (<= |old(~pumpRunning~0)| 0) (<= 2 |old(~waterLevel~0)|) (<= |timeShift_isHighWaterLevel_~tmp___0~0#1| 1) (<= 0 ~head~0.base) (<= 0 ~methaneLevelCritical~0) (<= 0 ~pumpRunning~0) (<= ~head~0.base 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1|) (<= 0 |timeShift_isHighWaterSensorDry_~retValue_acc~2#1|) (<= |timeShift_isHighWaterSensorDry_#res#1| 0) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp~4#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~4#1|) (<= 0 |timeShift_isMethaneAlarm_#res#1|) (<= |timeShift_isMethaneAlarm_#res#1| 1) (<= 0 |#NULL.offset|) (<= 1 |timeShift_isHighWaterLevel_#res#1|) (<= |timeShift_isHighWaterLevel_~retValue_acc~5#1| 1) (<= 0 |timeShift___utac_acc__Specification1_spec__1_~tmp~4#1|) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:26,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:26,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:26,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-11-19 08:25:26,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159774153] [2022-11-19 08:25:26,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:26,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-19 08:25:26,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:26,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-19 08:25:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-11-19 08:25:26,706 INFO L87 Difference]: Start difference. First operand 217 states and 263 transitions. Second operand has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:25:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:29,202 INFO L93 Difference]: Finished difference Result 566 states and 702 transitions. [2022-11-19 08:25:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-19 08:25:29,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 32 [2022-11-19 08:25:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:29,207 INFO L225 Difference]: With dead ends: 566 [2022-11-19 08:25:29,207 INFO L226 Difference]: Without dead ends: 394 [2022-11-19 08:25:29,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=803, Invalid=6169, Unknown=0, NotChecked=0, Total=6972 [2022-11-19 08:25:29,213 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 376 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:29,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 306 Invalid, 1932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1723 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 08:25:29,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-11-19 08:25:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 330. [2022-11-19 08:25:29,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 222 states have (on average 1.1891891891891893) internal successors, (264), 245 states have internal predecessors, (264), 53 states have call successors, (53), 46 states have call predecessors, (53), 54 states have return successors, (72), 51 states have call predecessors, (72), 53 states have call successors, (72) [2022-11-19 08:25:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 389 transitions. [2022-11-19 08:25:29,277 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 389 transitions. Word has length 32 [2022-11-19 08:25:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:29,278 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 389 transitions. [2022-11-19 08:25:29,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 18 states have internal predecessors, (50), 7 states have call successors, (12), 5 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-19 08:25:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 389 transitions. [2022-11-19 08:25:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-19 08:25:29,280 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:29,280 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:29,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:29,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:29,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:29,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:29,488 INFO L85 PathProgramCache]: Analyzing trace with hash -451833817, now seen corresponding path program 1 times [2022-11-19 08:25:29,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:29,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034056892] [2022-11-19 08:25:29,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:29,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:25:29,925 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:29,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034056892] [2022-11-19 08:25:29,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034056892] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:29,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411373078] [2022-11-19 08:25:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:29,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:29,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:29,927 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:29,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:25:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:30,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-19 08:25:30,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:25:30,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:25:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411373078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1386955599] [2022-11-19 08:25:30,359 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-19 08:25:30,360 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:30,360 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:30,360 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:30,361 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:33,362 INFO L197 IcfgInterpreter]: Interpreting procedure waterRise with input of size 23 for LOIs [2022-11-19 08:25:33,365 INFO L197 IcfgInterpreter]: Interpreting procedure timeShift with input of size 41 for LOIs [2022-11-19 08:25:33,608 INFO L197 IcfgInterpreter]: Interpreting procedure isMethaneLevelCritical with input of size 36 for LOIs [2022-11-19 08:25:33,613 INFO L197 IcfgInterpreter]: Interpreting procedure changeMethaneLevel with input of size 38 for LOIs [2022-11-19 08:25:33,620 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:36,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4138#(and (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1| 0)) (<= ~methaneLevelCritical~0 1) (= ~pumpRunning~0 |timeShift_isPumpRunning_~retValue_acc~4#1|) (= ~head~0.offset 0) (<= |timeShift_isPumpRunning_#res#1| 2147483647) (<= 0 ~methaneLevelCritical~0) (= |timeShift___utac_acc__Specification1_spec__1_~tmp~4#1| ~methaneLevelCritical~0) (= ~head~0.base 0) (= |#NULL.offset| 0) (= |timeShift_isPumpRunning_#res#1| |timeShift___utac_acc__Specification1_spec__1_~tmp___0~2#1|) (not (= |timeShift___utac_acc__Specification1_spec__1_~tmp~4#1| 0)) (= |timeShift_isPumpRunning_#res#1| |timeShift_isPumpRunning_~retValue_acc~4#1|) (<= 0 (+ |timeShift_isPumpRunning_#res#1| 2147483648)) (<= 0 |#StackHeapBarrier|) (<= ~systemActive~0 1) (= ~cleanupTimeShifts~0 4) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:36,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:36,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:36,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 12 [2022-11-19 08:25:36,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734324171] [2022-11-19 08:25:36,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:36,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:25:36,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:36,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:25:36,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2022-11-19 08:25:36,961 INFO L87 Difference]: Start difference. First operand 330 states and 389 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 7 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 08:25:37,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:37,947 INFO L93 Difference]: Finished difference Result 795 states and 961 transitions. [2022-11-19 08:25:37,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-19 08:25:37,948 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 7 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 49 [2022-11-19 08:25:37,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:37,951 INFO L225 Difference]: With dead ends: 795 [2022-11-19 08:25:37,952 INFO L226 Difference]: Without dead ends: 520 [2022-11-19 08:25:37,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1343 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=371, Invalid=3411, Unknown=0, NotChecked=0, Total=3782 [2022-11-19 08:25:37,955 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 248 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:37,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 410 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:25:37,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-19 08:25:38,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 365. [2022-11-19 08:25:38,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 244 states have (on average 1.1967213114754098) internal successors, (292), 270 states have internal predecessors, (292), 58 states have call successors, (58), 55 states have call predecessors, (58), 62 states have return successors, (82), 55 states have call predecessors, (82), 58 states have call successors, (82) [2022-11-19 08:25:38,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 432 transitions. [2022-11-19 08:25:38,019 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 432 transitions. Word has length 49 [2022-11-19 08:25:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:38,020 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 432 transitions. [2022-11-19 08:25:38,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 7 states have call successors, (15), 4 states have call predecessors, (15), 5 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-11-19 08:25:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 432 transitions. [2022-11-19 08:25:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-19 08:25:38,022 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:38,022 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:38,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:25:38,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 08:25:38,227 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION === [timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 08:25:38,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:38,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1382868760, now seen corresponding path program 1 times [2022-11-19 08:25:38,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:38,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429534400] [2022-11-19 08:25:38,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:38,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:38,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:25:38,248 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-19 08:25:38,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-19 08:25:38,287 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-19 08:25:38,287 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-19 08:25:38,289 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location timeShiftErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-19 08:25:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:25:38,294 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:38,298 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-19 08:25:38,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 08:25:38 BoogieIcfgContainer [2022-11-19 08:25:38,363 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-19 08:25:38,364 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-19 08:25:38,364 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-19 08:25:38,364 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-19 08:25:38,365 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:25:00" (3/4) ... [2022-11-19 08:25:38,366 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-19 08:25:38,425 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/witness.graphml [2022-11-19 08:25:38,425 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-19 08:25:38,426 INFO L158 Benchmark]: Toolchain (without parser) took 38889.20ms. Allocated memory was 123.7MB in the beginning and 308.3MB in the end (delta: 184.5MB). Free memory was 82.8MB in the beginning and 157.4MB in the end (delta: -74.6MB). Peak memory consumption was 108.3MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,426 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory is still 100.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-19 08:25:38,427 INFO L158 Benchmark]: CACSL2BoogieTranslator took 585.01ms. Allocated memory is still 123.7MB. Free memory was 82.6MB in the beginning and 90.4MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,427 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.18ms. Allocated memory is still 123.7MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,427 INFO L158 Benchmark]: Boogie Preprocessor took 29.88ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 86.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,428 INFO L158 Benchmark]: RCFGBuilder took 665.12ms. Allocated memory is still 123.7MB. Free memory was 86.8MB in the beginning and 62.6MB in the end (delta: 24.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,428 INFO L158 Benchmark]: TraceAbstraction took 37492.82ms. Allocated memory was 123.7MB in the beginning and 308.3MB in the end (delta: 184.5MB). Free memory was 61.6MB in the beginning and 162.7MB in the end (delta: -101.1MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,429 INFO L158 Benchmark]: Witness Printer took 61.41ms. Allocated memory is still 308.3MB. Free memory was 162.7MB in the beginning and 157.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-19 08:25:38,431 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 123.7MB. Free memory is still 100.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 585.01ms. Allocated memory is still 123.7MB. Free memory was 82.6MB in the beginning and 90.4MB in the end (delta: -7.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.18ms. Allocated memory is still 123.7MB. Free memory was 90.4MB in the beginning and 88.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.88ms. Allocated memory is still 123.7MB. Free memory was 88.3MB in the beginning and 86.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 665.12ms. Allocated memory is still 123.7MB. Free memory was 86.8MB in the beginning and 62.6MB in the end (delta: 24.2MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 37492.82ms. Allocated memory was 123.7MB in the beginning and 308.3MB in the end (delta: 184.5MB). Free memory was 61.6MB in the beginning and 162.7MB in the end (delta: -101.1MB). Peak memory consumption was 85.1MB. Max. memory is 16.1GB. * Witness Printer took 61.41ms. Allocated memory is still 308.3MB. Free memory was 162.7MB in the beginning and 157.4MB in the end (delta: 5.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 415]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L714] static struct __ACC__ERR *head = (struct __ACC__ERR *)0; [L58] int methaneLevelCritical = 0; [L157] int pumpRunning = 0; [L57] int waterLevel = 1; [L158] int systemActive = 1; [L446] int cleanupTimeShifts = 4; [L522] int retValue_acc ; [L523] int tmp ; [L527] FCALL select_helpers() [L528] FCALL select_features() [L529] CALL, EXPR valid_product() [L937] int retValue_acc ; [L940] retValue_acc = 1 [L941] return (retValue_acc); [L529] RET, EXPR valid_product() [L529] tmp = valid_product() [L531] COND TRUE \read(tmp) [L533] FCALL setup() [L534] CALL runTest() [L513] CALL test() [L345] int splverifierCounter ; [L346] int tmp ; [L347] int tmp___0 ; [L348] int tmp___1 ; [L349] int tmp___2 ; [L352] splverifierCounter = 0 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L354] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, waterLevel=1] [L356] COND TRUE splverifierCounter < 4 [L362] tmp = __VERIFIER_nondet_int() [L364] COND TRUE \read(tmp) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=1] [L366] CALL waterRise() VAL [\old(waterLevel)=1, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=1] [L75] COND TRUE waterLevel < 2 [L76] waterLevel = waterLevel + 1 [L366] RET waterRise() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, waterLevel=2] [L372] tmp___0 = __VERIFIER_nondet_int() [L374] COND FALSE !(\read(tmp___0)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, waterLevel=2] [L382] tmp___2 = __VERIFIER_nondet_int() [L384] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=2] [L399] CALL timeShift() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L165] COND FALSE !(\read(pumpRunning)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L172] COND TRUE \read(systemActive) [L174] CALL processEnvironment() [L194] int tmp ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L197] COND TRUE ! pumpRunning [L199] CALL, EXPR isHighWaterLevel() [L309] int retValue_acc ; [L310] int tmp ; [L311] int tmp___0 ; [L315] CALL, EXPR isHighWaterSensorDry() [L137] int retValue_acc ; [L140] COND FALSE !(waterLevel < 2) [L144] retValue_acc = 0 [L145] return (retValue_acc); [L315] RET, EXPR isHighWaterSensorDry() [L315] tmp = isHighWaterSensorDry() [L317] COND FALSE !(\read(tmp)) [L320] tmp___0 = 1 [L322] retValue_acc = tmp___0 [L323] return (retValue_acc); [L199] RET, EXPR isHighWaterLevel() [L199] tmp = isHighWaterLevel() [L201] COND TRUE \read(tmp) [L203] CALL activatePump() [L228] int tmp ; [L232] CALL, EXPR isMethaneAlarm() [L253] int retValue_acc ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L257] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L96] int retValue_acc ; [L99] retValue_acc = methaneLevelCritical [L100] return (retValue_acc); [L257] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=0, methaneLevelCritical=0, pumpRunning=0, systemActive=1, waterLevel=2] [L257] retValue_acc = isMethaneLevelCritical() [L259] return (retValue_acc); [L232] RET, EXPR isMethaneAlarm() [L232] tmp = isMethaneAlarm() [L234] COND FALSE !(\read(tmp)) [L238] CALL activatePump__wrappee__highWaterSensor() [L222] pumpRunning = 1 [L238] RET activatePump__wrappee__highWaterSensor() [L203] RET activatePump() [L174] RET processEnvironment() [L180] CALL __utac_acc__Specification1_spec__1() [L421] int tmp ; [L422] int tmp___0 ; VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L426] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L96] int retValue_acc ; [L99] retValue_acc = methaneLevelCritical [L100] return (retValue_acc); [L426] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=0, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L426] tmp = isMethaneLevelCritical() [L428] COND FALSE !(\read(tmp)) VAL [\old(pumpRunning)=0, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, tmp=0, waterLevel=2] [L180] RET __utac_acc__Specification1_spec__1() [L399] RET timeShift() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=2] [L354] COND TRUE 1 VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=1, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=2] [L356] COND TRUE splverifierCounter < 4 [L362] tmp = __VERIFIER_nondet_int() [L364] COND FALSE !(\read(tmp)) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=0, tmp___1=0, tmp___2=-1, waterLevel=2] [L372] tmp___0 = __VERIFIER_nondet_int() [L374] COND TRUE \read(tmp___0) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=-2, tmp___1=0, tmp___2=-1, waterLevel=2] [L376] CALL changeMethaneLevel() VAL [\old(methaneLevelCritical)=0, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=0, pumpRunning=1, systemActive=1, waterLevel=2] [L87] COND FALSE !(\read(methaneLevelCritical)) [L90] methaneLevelCritical = 1 [L376] RET changeMethaneLevel() VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=-2, tmp___1=0, tmp___2=-1, waterLevel=2] [L382] tmp___2 = __VERIFIER_nondet_int() [L384] COND TRUE \read(tmp___2) VAL [cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, splverifierCounter=0, systemActive=1, tmp=0, tmp___0=-2, tmp___1=0, tmp___2=-3, waterLevel=2] [L399] CALL timeShift() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=2] [L165] COND TRUE \read(pumpRunning) [L167] CALL lowerWaterLevel() [L63] COND TRUE waterLevel > 0 [L64] waterLevel = waterLevel - 1 [L167] RET lowerWaterLevel() [L172] COND TRUE \read(systemActive) [L174] CALL processEnvironment() [L194] int tmp ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L197] COND FALSE !(! pumpRunning) VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L212] FCALL processEnvironment__wrappee__base() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L174] RET processEnvironment() [L180] CALL __utac_acc__Specification1_spec__1() [L421] int tmp ; [L422] int tmp___0 ; VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L426] CALL, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L96] int retValue_acc ; [L99] retValue_acc = methaneLevelCritical [L100] return (retValue_acc); [L426] RET, EXPR isMethaneLevelCritical() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, isMethaneLevelCritical()=1, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] [L426] tmp = isMethaneLevelCritical() [L428] COND TRUE \read(tmp) [L430] CALL, EXPR isPumpRunning() [L264] int retValue_acc ; [L267] retValue_acc = pumpRunning [L268] return (retValue_acc); [L430] RET, EXPR isPumpRunning() [L430] tmp___0 = isPumpRunning() [L432] COND TRUE \read(tmp___0) [L434] CALL __automaton_fail() [L415] reach_error() VAL [\old(pumpRunning)=1, \old(waterLevel)=2, cleanupTimeShifts=4, head={0:0}, methaneLevelCritical=1, pumpRunning=1, systemActive=1, waterLevel=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 37.3s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 887 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 868 mSDsluCounter, 1287 SdHoareTripleChecker+Invalid, 2.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 991 mSDsCounter, 434 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3082 IncrementalHoareTripleChecker+Invalid, 3516 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 434 mSolverCounterUnsat, 296 mSDtfsCounter, 3082 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 387 GetRequests, 194 SyntacticMatches, 14 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3646 ImplicationChecksByTransitivity, 20.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=365occurred in iteration=7, InterpolantAutomatonStates: 109, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 7 MinimizatonAttempts, 290 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 319 NumberOfCodeBlocks, 319 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 1330 SizeOfPredicates, 23 NumberOfNonLiveVariables, 455 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 11 InterpolantComputations, 5 PerfectInterpolantSequences, 36/65 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-19 08:25:38,456 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_24e45641-1e25-4ff4-af25-48612ea803c6/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE